56 ms·
Successful room temperature ambient-pressure magnetic levitation of LK-99
- y04nn 3y agoIf we are able to make superconductor magnets, create a fusion reactor and as a same time have lossless transmissions of power. Would it make energy extremely cheap ? Can access to energy become free and delivered as a commodity by countries to attract businesses and taxpayers ? This would be mind blowing, with this and automation/robotisation of work, life as we know it today will seam very ancient for next century generations. Also, are there other blocking points for inertial confinement fusion ? Would it also make solar power and wind farm pointless ?
- TylerE 3y agoWow, is this it? Is this the confirmation?
- carabiner 3y agoWe are so back.
- asynchronous 3y agoFrom what little I understand the levitation effect doesn’t necessarily equal all the properties of a superconductor. It’s one of them though.
- taneq 3y agoI believe there’s no way to stably suspend an object on permanent magnetic fields, so if this is stable and doesn’t fall down then it’s hard to argue superconductivity isn’t involved.
- stevespang 3y ago[dead]
- johncolanduoni 3y agoThere are diamagnetic non-superconductors like pyrolytic graphite that can also evade Earnshaw's theorem, but this would be the first metal with this strength of diamagnetism at room temperature AFAIK.
- sudosysgen 3y agoPyrolitic graphite can evade Earnshaw's theorem only with either specific magnet array shapes or with rotation, they still can't stably levitate on a regular dipole without rotation.
- taneq 3y agoIt can be done at all with a static arrangement of magnetic fields, though? Ooh.
- TylerE 3y agoIsn’t that those floaty spinning desk toys are?
- johncolanduoni 3y agoThose usually use active electromagnets, which also bypass the preconditions of Earnshaw’s theorem.
- taneq 3y ago
- marcodiego 3y agoOk, didn't read it. What about electric resistance at room temperature ambient-pressure under critical current?
- codezero 3y agoThey said they are testing that next. Sounds like they wanted to get the initial results out.
- zdragnar 3y agoSo far, from my understanding, the sample size of the material has been small enough it's been difficult to rule out resistance from corrosion on the contacts of the sensors, though I seem to recall a post not too long ago on here about resistance below the threshold of measurement around 100 degrees k. The compound must be tricky to synthesize with a good degree of purity- I think we'll learn quite a bit more if someone manages to get a bigger sample than a flake the size of the point of a needle.
- ufo 3y agoSeems to be the same one that had a video a couple of days ago https://news.ycombinator.com/item?id=36953396 https://news.ycombinator.com/item?id=36953396 Back then, many asked if this was superconduction or merely diamagnetism. Does the new paper shine any light on this question?
- saladdressing 3y ago[dead]
- lamontcg 3y agoThe exact same video URL (https://www.bilibili.com/video/BV14p4y1V7kS/ https://www.bilibili.com/video/BV14p4y1V7kS/) is linked to in this article. There doesn't seem to be anything new here.
- deleted 3y ago[deleted]
- scarmig 3y agoThe paper shows a clear phase transition to diamagnetism as the material is cooled. That would be seen in superconductors and not in regular diamagnetic materials. I'm not aware of any that have that kind of phase transition. Though since we're in weird territory here, it's important to note some weird non-superconductor behavior that's beyond regular diamagnetism might be going on as an alternative explanation. But it is weird. ETA: also, in the presence of a magnetic field, that transition temperature decreases. That's pretty huge. Unless this paper is fraudulent, I take this as the biggest positive evidence so far that something besides simple diamagnetism is going on. And, cards on table, with the assumption that the paper is not fraudulent, this pushes my odds above 50% for the first time.
- jamiek88 3y ago>we successfully verify and synthesize the LK-99 crystals which can be magnetically levitated with larger levitated angle than Sukbae Lee's sample at room temperature. It is expected to realize the true potential of room temperature, non-contact superconducting magnetic levitation in near future. Aaaand we’re back! I’m really trying to remain (reasonably, not ideologically) skeptical but if this is legit this is a huge step towards confirmation.
- MBCook 3y agoAt this point, even if this doesn’t turn out to be the holy grail this seems like it would still be a very big step/promising avenue for research on the path right?
- carbonguy 3y agoIANA physicist, so grain of salt etc. but yes, I agree with your assessment - even if not as impressive as we're all hoping, at the least we have a very promising new vein of superconductor research to mine (as it were). In other words: even the downside here is great, and the upside is...
- gibolt 3y agoIt still hasn't been a week. Giving a bunch of these teams and one's with no announcements yet an additional year will hopefully lead to some very exciting findings
- lunfard000 3y agoHopefully this is the AlexNet of the superconductors :fingers-crossed:
- neteresy 3y agoKorean scientists embody key cultural values: (Jeong) fosters deep bonds and commitment to their work; (In-gan-mi) encourages inherent honesty and sincerity; (Che-Myun) upholds honor, discouraging dishonesty; and Confucianism instills respect, loyalty, and duty. These values shape their dedication to research integrity and professional conduct. I choose to believe!
- marmakoide 3y agoYeah, nah https://en.wikipedia.org/wiki/Hwang_affair https://en.wikipedia.org/wiki/Hwang_affair National pride and science are not a very good mix
- agnosticmantis 3y agoIt’s a breath of fresh air reading about actual revolutionary science happening. The deluge of news about non-replicable results, fabricated data, overhyped press releases from both academia and industry had become really depressing. For once after a long time it’s the real deal. Even if this is not a RT superconductor, it’s now evident that the original authors didn’t cheat and are not crackpots as initially suspected by most.
- mieubrisse 3y agoAgreed. It's felt like so many of the technological marvels have either happened quietly (e.g. the reductions in chip size) or in the past (e.g. all the physics breakthroughs of the 1900s). Like ChatGPT, this seems to have the characteristics of being both accessible and completely novel.
- fnordpiglet 3y agoI feel like the host of “in 30 years we would have X” made 40 years ago are suddenly manifesting.
- jacquesm 3y agoWhat is interesting is that assuming it all pans out these are all in entirely unrelated fields. That sets the stage for a whole raft of follow on inventions. Similar to how the telephone + basic electromagnetism led to radio, tv, radar, transistors and ultimately to computers small enough to be practical for businesses, the internet, cell phones and so on. My grandmother was born in a house without running water, no sanitation and no phone. That's just a bit over a century ago. The rate of change on an annual basis isn't all that large, a decade and you'll see big changes, our world can't be compared at all to 120 years ago in terms of luxury, communications, personal energy budget, food, travel options etc. Still, there are large areas of the planet where the last 120 didn't bring any progress and there are those where they actually went backwards, not rarely to our (the western world for me) benefit.
- 3y ago
- cypherpunks01 3y agoWhy are folks trying to prove that this material is a superconductor in roundabout ways, like levitation, dimagnetism, etc? What is the reason they don't just test to see if electrical current flows without resistance? Surely there is something I am missing here.
- rendang 3y agoPurely speculating, but might it be easy to doubt resistance measurements by claiming that equipment was faulty or used incorrectly?
- jacquesm 3y agoThey do both. But measuring the resistance of something that is that small is super hard because it will be close to zero anyway even if it isn't superconducting. So a larger sample would give much more conclusive results.
- caconym_ 3y agoI have heard people much more knowledgeable than me say that measuring true zero resistance is actually quite difficult and takes some degree of specialized equipment, especially with such small samples. That may be part of it.
- jacquesm 3y agoJust getting the probes to connect reliably is tricky. depending on how large the superconducting features are it may be anywhere from just difficult to next to impossible to do accurately (for instance, if the size of the superconducting features is smaller than the probe size).
- balaji1 3y agoso none of the previous more esoteric superconductors were ever measure for zero resistance?
- whimsicalism 3y ago
- deleted 3y ago[deleted]
- ayakang31415 3y agoThere have been quite a few papers about LK-99, but the only thing I want to see is whether we observer sudden drop of resistance to zero below the critical temperature that is well above the room temperature at ambient pressure or not. So far, I haven't seen one.
- jacquesm 3y agoThat's not a trivial measurement with a small sample. Typically you measure resistance that small like this: +<-------sample------>- ---------p p-------- The + and - leads send a reference current (using something called a 'current source[1]', a specialist supply that cranks the voltage up and down to maintain a steady current, within some arbitrary range, usually from a few mV to 10's or even 100's of volts) that you pick (not so low that you won't get a voltage, not so high that you exceed the expected maximum current for the cross section that you are measuring) down the two leads to the sample and then you measure the voltage across the two points 'p' using the other two leads. This is similar to using a shunt for measuring a current, only now you are interested in the resistance of 'sample'. It also elegantly rules out accidentally measuring the resistance of the probe wires and has the added advantage that you can measure the voltage almost without drawing a current (though at such low resistance you have to take great care to ensure that your measurement doesn't consume a disproportionally large chunk of the reference current). If 'sample' is a nice fat chunk of material you can expect an accurate result because it will be easy to attach to in a reliable way, you can use a lot of current and the sample is large enough to have a resistance high enough that the voltage you are measuring is well outside of the noise. But for a small sample the resistance is almost always going to be very small and the difference between a few nanovolts and zero are hard to distinguish. So that's why you won't be seeing any conclusive measurements of the real resistance (or zero) until larger samples can be made, long enough to show a sizeable voltage drop or none at all. [1] https://en.wikipedia.org/wiki/Current_source https://en.wikipedia.org/wiki/Current_source
- httpz 3y agoThis can take a while. With the current fabrication process, they're only getting a chunk with LK-99 particles sprinkled in. Since nobody yet knows how to fabricate a pure chunk of LK-99, it'll be hard to measure the true resistance of LK-99.
- bigmattystyles 3y agoI hope Smith charts become less required learning. When I was in school, I could not wrap my head around them. I should look at them against. (Yes, of course you’d still need to account for traditional loads)
- mighmi 3y agoThis simplifies them a fair bit: https://www.youtube.com/watch?v=pXWbdxOAuDs https://www.youtube.com/watch?v=pXWbdxOAuDs
- bobmaxup 3y agohttps://en.wikipedia.org/wiki/LK-99#Replication_attempts https://en.wikipedia.org/wiki/LK-99#Replication_attempts This Wikipedia article has a good summary of the replication attempts to date (including this paper).
- someplaceguy 3y agoReading further below, I'm actually amazed by all the theoretical studies that have already been done from first principles (all apparently supporting the possibility of superconductivity). That's a pretty fast pace for science!
- seydor 3y agoBut have they asked chatgpt?
- awb 3y agoMagnus Carlson said that if you tell him there’s a winning move on a chess board he could find it very quickly, because his focus becomes extremely narrow. I wonder if something similar is happening here. Since the scope was defined as LK-99, it becomes a narrow query instead of a broad one.
- Sharlin 3y agoThis is not just telling someone there's a winning move. It's telling them that X is a winning move and they just have to verify that X is indeed one. Many, many problems are such that it's difficult to find a solution but easy to verify one.
- fabk 3y agoThanks, can I scream my hype out, now?
- deepp805 3y agoI'm not too familiar with this space. Could someone explain how big of an impact to the world this discovery is? What does the future of this technology look like over the next 5 years?
- jacquesm 3y agoIf true, five years not that much difference. A few decades, large differences.
- distortionfield 3y ago“People always overestimate what they can do in a year and underestimate what they can do in ten.” - someone much smarter than me.
- wildzzz 3y agoSuperconductors have applications in computers, MRIs, maglev trains, and power transmission to name a few. Superconduction at room temp would all for less current consumption due to resistance inside the metal layer for chips, letting them run cooler and faster. MRIs use massive, supercooled magnets. If you can do the same at room temp, you could potentially have a portable or much smaller and more efficient MRI. If you can levitate an object, you can use a lot less power running electromagnets to run things like maglev trains. If you have power lines that have zero resistance, you can reduce wasted energy. Power lines will actually sag under heavy load due to heat and cause outages or forest fires, this could be avoided.
- unlikelymordant 3y agoAnything that uses an electric motor can use a smaller more efficient motor, id expect big changes in e.g. electric cars, but also probably things like robotic actuators getting smaller and more efficient. Also there are superconductor based batteries that are very efficient, would would become a thing, likely revolutionising batteries.
- ecshafer 3y ago
- zzzeek 3y agoSo, these folks replicated the material and it does highly unusual things, is that right ? It had seemed the fabrication process was still very dodgy and unreliable, this team got it to work independently?
- WinnieRallycar 3y agoMy layman understanding is that this paper states the team replicated LK-99, and confirmed that it has a property of a super-conductor - this particular type of magnetic levitation.
- stainablesteel 3y agoi wonder if this will become the next version of hopium, where we struggle to refine a material that can actually be used in a wide enough temperature range to operate outside.
- roboticmind 3y agoThe initial paper claimed superconductivity up until 400 K (127 °C or 260 °F), so I think if that's the case it would be able to withstand outdoor conditions just fine
- deleted 3y ago[deleted]
- WinnieRallycar 3y agoIndeed, operating temperature seems to me less of a concern. Considering how difficult it‘s been to produce LK-99 so far, some skepticism on being able to manufacture the material in mass is warranted, I think. Still, exciting! I’m hopeful :)
- nomel 3y agoConsidering how people are making it at all, within days, with demonstrably poor instructions, seems to suggest manufacturing in mass has massive hope, once some time is given for refining the process.
- parineum 3y agoAlso consider just how many people will be working on this with nation-state budgets. It has such general applications that nearly every field tangentially connected to electricity or magnetism would be interested. It wouldn't be like the investment in something that would be similarly revolutionary but with a less certain end game like fusion.
- reilly3000 3y agoWhere will the money flow from here, presuming that the reproduction keeps happening?
- carbonguy 3y agoAlmost certainly: improving the ease/consistency of producing this stuff.
- 0cf8612b2e1e 3y agoOn a completely different front, let's say the paper completely checks out and they have discovered this miracle. How strong are the patent protections on materials science? For example, if someone could replicate the effect with lead + gold, would that be considered a novel material which would not be subject to licensing? Is it the material itself or the method of production?
- scarmig 3y agoI'm sure it depends on jurisdiction, but in the US, you can't patent a material, only a method to make it. If I recall correctly, their patent for method covered a wide range of constituent elements, but left off gold. I would feel pretty bad for them if they genuinely discovered an RTP superconductor but that omission prevents them from becoming billionaires. But more likely the issue is that their current method has lots of room for improvement and someone else finds one that is substantially better. ETA: apparently wrong, can patent composition of very novel materials.
- NotYourLawyer 3y ago[flagged]
- Fatnino 3y agoYou're not my lawyer!
- dang 3y agoIf someone else is wrong and you know more, it would be great to share some of what you know so the rest of us can learn. But please don't post unsubstantive putdowns—they just make everything worse. https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sort=byDate&type=comment&query=share%20know%20learn%20by:dang https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor... https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
- 3y ago
- sergiotapia 3y agoThis makes me so happy for my children and their children. God bless those scientists and all scientists that push our species forward. I'm so lucky to be in my prime at the same time AGI and superconductors become a reality. Wow.
- nerdbert 3y ago> AGI Wait, I missed that one. Was it yesterday?
- sergiotapia 3y agoyes
- cryptonector 3y agoWhat's AGI?
- mfcl 3y agoArtificial general intelligence, and it does not exist yet.
- bagels 3y agoNeighbor: AGI is Artificial General Intelligence
- aflashofhue 3y ago[dead]
- LarsDu88 3y agoIf this thing really was super conducting, they should be able to rotate the sample upside down from flux pinning right? That's why this thing is probably just a magnet and not a superconductor??
- savrajsingh 3y agoyou'd hope that if we know that, the actual scientists confirming this stuff know that too
- eulgro 3y agoThe paper shows that the sample isn't attracted to the magnet, only repulsed.
- jiggawatts 3y agoAll of the "it floats" videos are unattributed leaks or come from less-than-reputable sources. The reputable sources only ever show videos of the sample touching the magnet. From what I'm reading, several different types of materials can angle themselves like this from a magnet, but only Type II superconductors will float above a single monolithic magnet. Until we see a confirmed video from a reputable source of a visible gap between the sample and the magnet, it's not confirmed that LK-99 is superconducting.
- kijin 3y agoThe problem is that no one has a pure sample of LK-99, only chunks of rock containing small areas of LK-99. So even if LK-99 is a true RT superconductor, we're only going to see levitation on the side of the chunk that has a high enough concentration of it. It's like trying to evaluate a diamond by poking at a rock that might or might not have any diamonds buried inside. It must be really frustrating. So yeah, I hope there's a better way to evaluate this substance than "it floats!"
- civicrypt123 3y agoNoob question. Does this breakthrough also translate to advancements in quantum computing? Can we expect quantum computers with far more qbits?
- scarmig 3y agoNope. Quantum computing requires low temperatures not because of resistance but to maintain coherence.
- seewhydee 3y agoA room temperature superconductor would, by definition, maintain quantum coherence (of the superconducting order parameter) at room temperature.
- sudosysgen 3y agoThat's not what is meant by coherence, what is required in a quantum computer is for multiple qbits to maintain states coherent to each other. Current quantum computers operate in the milikelvin range for a reason, despite superconductors working at 1000x higher temperatures.
- qnleigh 3y agoIt won't have a direct impact on quantum computing. People make qubits out of superconducting materials that become superconducting at 4K or higher, but you have to cool them to around 0.03 K for them to really work well as qubits. See https://en.m.wikipedia.org/wiki/Superconducting_quantum_computing https://en.m.wikipedia.org/wiki/Superconducting_quantum_comp.... But there could very well be indirect applications! This would be very very interesting for the physics community, and surely lead to other new things.
- est 3y agoSo far lab replication efforts are: Two from HUST: https://www.bilibili.com/video/BV14p4y1V7kS/ https://www.bilibili.com/video/BV14p4y1V7kS/ https://www.bilibili.com/video/BV13k4y1G7i1/ https://www.bilibili.com/video/BV13k4y1G7i1/ One by USTC https://www.bilibili.com/video/BV1Ex4y1X7ix/ https://www.bilibili.com/video/BV1Ex4y1X7ix/ this tiny sample can stand on its pointy side. One by Qufu Normal University https://www.zhihu.com/zvideo/1669820225079070720 https://www.zhihu.com/zvideo/1669820225079070720 One with THU background but claims a personal project https://www.bilibili.com/video/BV14z4y1s7Vo https://www.bilibili.com/video/BV14z4y1s7Vo Why are't more labs outside China making LK-99 and publish videos?
- jacquesm 3y ago> Why are't more labs outside China making LK-99 and publish videos? some possibilities: - they have not been able to conclusively replicate anything and don't want to publish a negative result for fear of someone else publishing a conclusive positive result later. - they are more careful to publish something that they are not (yet?) 100% sure about - they don't care so much about the whole 'science in the spotlight' thing and prefer to go the traditional route of publishing after peer review of one or more papers rather than to make YT videos and having to fend off a barrage of interaction - fear of getting it wrong.
- deleted 3y ago[deleted]
- senttoschool 3y agoTo add to your list of possible reasons: - There are way more STEM graduates in China by a wide margin - 18/20 of top universities in the world for chemistry research is in China according to Nature, including one of the attempts by USTC (#2 ranking): https://www.nature.com/nature-index/institution-outputs/generate/chemistry/global/all https://www.nature.com/nature-index/institution-outputs/gene... - Supply chain is faster in China for chemicals and materials - China has more money/equipment for this sort of stuff - China is on average, more pro-science than the rest of the world
- elromulous 3y agovideo[0] linked from wikipedia[1] showing the levitation in action. [0] https://www.bilibili.com/video/BV14p4y1V7kS/ https://www.bilibili.com/video/BV14p4y1V7kS/ [1] https://en.wikipedia.org/wiki/LK-99#cite_note-51 https://en.wikipedia.org/wiki/LK-99#cite_note-51
- matsemann 3y agoWow, didn't realize what we're working with here is smaller than a speck of sand.
- fnord77 3y agoCold fusion all over again. All the internet predictions of what this will bring are kinda cringey and pathetic
- jakeinspace 3y agoTouché, but will you eat your hat if it turns out to be true?
- cthalupa 3y agoNot even close. Cold fusion was not something we thought was possible under our understanding of physics at the time (Muon-catalyzed fusion isn't what they thought CF was and there are all sorts of things that make it not really something that we expect to ever be particularly useful for power generation, etc., so not much purpose in talking about it) Meanwhile, all our known physics have no issue with an RTAPS existing.
- deleted 3y ago[deleted]
- fnord77 3y agoI've seen some math that shows RTS are not possible.
- deleted 3y ago[deleted]
- ChuckMcM 3y agoFor those experiencing this type of "black swan, but good" event for the first time, it is helpful to recognize that the human tendency to believe that all future "big events" will be dystopian downers, is statistically unsound. For a while I've kept a list of the things that could be "good" swan events, but to be fair I didn't have "room temperature superconductor on that list" :-) Other things that could happen: 1) Fully decoding the cellular mechanism of cells allowing for the curing of any disease, repairing any genetic disorder. 2) Commercially viable fusion energy. Will change a lot of things. 3) An AI subsystem with some reasoning ability (yeah, could go either way) Etc.
- icapybara 3y ago1) doesn't make a whole lot of sense. A perfect understanding of something doesn't mean you can fix anything wrong with it. 3) has already happened. The AI chat bots aren't very smart, but they're clearly capable of some degree of basic reasoning.
- xvector 3y agoI'd go as to far as saying GPT-4 is capable of fairly complex reasoning, at least in my experience tossing complicated questions and situations at ChatGPT Plus.
- andrewmutz 3y agoGPT4 is simultaneously smarter than and stupider than anyone you've ever met.
- someplaceguy 3y agoI think that's a hilarious and accurate way of describing it :-)
- CSMastermind 3y agoWhen I was tutoring people in college for their computer science classes I was struck with how some people could do reasonably well on programming assignments and then when presented with anything even slightly novel would be completely unable to reason their way to a solution. A classic tell of this is people handling out of bounds errors in loops by trying to randomly add or subtract 1 from their for-loop parameters. I realized that they didn't have a mental model for what a loop did, they had simply memorized the syntax for a loop and were doing advanced pattern matching. Code repeats = write the for-loop syntax I've memorized. And then after seeing that fail with out of bounds exceptions, they learned a new rule: modify the loop parameters and see if that fixes the problem. When I think about how I write code, or I compare their approach to the other cohort of students I saw, it's a different process. I see in my mind's eye a type of 'machine' that performs the actions that I want to take place. I simulate running that machine in my mind and tweak its design until it works the way I want it to. Only then do I think about syntax and try to translate what's already happening in my mind into source code. I've seen people get shockingly far into software engineering careers using the pattern matching / guess and check approach. I've wondered if a lot of the handwringing you see on programming forums about the 'leetcode grind' is coming from people who do this pattern matching approach. To them it must seems like the only way to solve these problems is to simply train their internal pattern matching neural networks on huge amounts of examples. The code that I see GPT generate looks eerily similar to what I saw from those programmers. And that makes sense because I think that functionally they're doing the same thing. Only GPT does it at a superhuman level. That seems to me to indicate that there's something that at least some humans do with a mental model that our current LLMs lack. If someone figures out how to simulate those mental processes in a computer program I think we'll see a huge inflection point and that's what the original comment (as I read it) is referring to.
- nocoder 3y agoI get the idea of superconductivity at room temperature in theory. But I don't have enough knowledge to understand in real terms, how will the world change if this is true?
- chii 3y agoFor one, lossless storage of electricity.
- dgoldstein0 3y agoI think you mean lossless transmission? If we can actually replace transmission lines effectively with it, unclear whether it's practical for that yet.
- heisenzombie 3y agoAlso energy storage: https://en.wikipedia.org/wiki/Superconducting_magnetic_energy_storage https://en.wikipedia.org/wiki/Superconducting_magnetic_energ...
- dgoldstein0 3y agoNeat, I hadn't heard of it, but totally makes sense
- jacquesm 3y agoThat's how superconductivity was demonstrated in the early days: a current in a loop that didn't decay.
- Sporktacular 3y agoBoth. There are coil based ideas for storage.
- bawolff 3y agoEveryone talking about all sorts of important applications. All i want is a maglev hot wheels track using flux pinning. Just imagine all the cool toys a room temp semiconductor would enable.
- WhereIsTheTruth 3y agoChina is taking the lead, they harvest the fruit of their massive investment in education 20 years ago, congrats!
- nafey 3y agoThis is a South Korean breakthrough
- WhereIsTheTruth 3y agoI am not stupid, I know that However, take a look at this: https://en.wikipedia.org/wiki/LK-99#Replication_attempts https://en.wikipedia.org/wiki/LK-99#Replication_attempts 0 from both the EU and the US Getting downvoted over this speaks volume ;)
- austinwade 3y agoI would assume that many US labs are also attempting to replicate it, but are just not as public as the wikipedia listed attempts. Also US government agencies/labs are probably working around the clock to make and test this stuff but in secrecy.
- devX3 3y agoThere are two entries now from US labs added. I'm sure many more attempts are being made but are not on the chart. Maybe Wikipedia is not always up to date and accurate?
- pjungwir 3y agoThe last week reminds me of the story of Bardeen & Brattain's invention of the transistor (e.g. in The Idea Factory). It barely worked and heaven forbid you bump the table. There was even a third slighted figure who wanted credit. Part of me wants to be skeptical but OTOH if it's hard to reproduce that seems totally normal. How exciting that some other people have got it working now.
- rnk 3y agoGreat observation.
- mrtksn 3y agoThings also tend to be invented at about the same time at different places. I wonder if there are other people who were this close to invent it but just couldn't get it right.
- httpz 3y agoApparently the theory behind LK-99 was inspired by the studies from Eastern European scientists. However, after the Soviet collapse, the study was lost.
- mrtksn 3y agovery interesting, is there a an article about it?
- Painsawman123 3y agonot an article, but there's a tweet (yeah oftentimes Twitter can be useful :) ): https://nitter.net/sanxiyn/status/1686782919178911744 https://nitter.net/sanxiyn/status/1686782919178911744
- katrotz 3y agoI found it extremely entertaining to follow the twitter epopeea around Lk99 topic. Apparently the Iris posts were not just empty words and trolling.
- soulofmischief 3y agoI'm looking forward to experiments with LK-99 and twistronics. What a time to be alive. https://en.wikipedia.org/wiki/Twistronics https://en.wikipedia.org/wiki/Twistronics. https://arxiv.org/ftp/arxiv/papers/2101/2101.04501.pdf https://arxiv.org/ftp/arxiv/papers/2101/2101.04501.pdf
- heisenzombie 3y agoI think LK99 is a 1D — not 2D — material.
- mycall 3y agoI still don't understand 0D and 1D. Quantum dots, nanoparticles.. are they really 3D but too small to measure?
- hwillis 3y ago1D just means it conducts in one direction. Like it's got tiny wires in it. It's not particularly unusual; anisotropic conductive adhesive is used in your cellphone to glue the screen on. They tape over the electrical pads, then line up the corresponding LCD pads. The tape allows current to flow vertically between the pads, but for adjacent pads it's insulating. Neodymium magnets are another example. They're made up of a little honeycomb, and inside the cells of the comb are very long, needles of neodymium a single atom thick. They create a magnetic field in a single direction.
- jacquesm 3y agoBut that's an artifact of using two materials in alternation, not an artifact of one material showing 1d conduction.
- soulofmischief 3y ago2D in materials science means 1 dimension is nano-sized, typically referring to sheets of material that are 1-2 atoms thick. 1D means 2 dimensions are nano-sized. I'm not hip on superconductor science and haven't heard of 1D/2D being used to describe conducting in 1 or 2 directions, do you have any further reading on that?
- Ayaan_4125 3y agoHii
- geuis 3y agoThis is the first time in years where I physically have goosebumps the more this seems to be verified. In a good way. The potential changes this can introduce is equivalent to when Faraday, Volte, and all the other 17th/18th century scientists started figuring out how electricity works. They had no idea how much it would change every aspect of life in the century to come after them.
- fnands 3y agoThere is a reason why room temperature (ambient pressure) superconductors have been one of the holy grails of physics for such a long time: the implications are profound. I used to be a particle physicist, and some of the more complex systems were just those used to cool the superconducting magnets down to cold enough that they become superconducting. If you can do that at ambient temp, you don't have to bother with that entire system. Also: fusion reactors rely on superconducting magnets (or if you are JET live with the fact that you can only run your magnets for a few seconds before the overheat), so can have a large impact on future fusion reactors.
- jacquesm 3y agoThere would be some massive deprecation at the CERN and ITER sites.
- regularfry 3y agoYou've got me wondering how much cheaper ITER actually gets if you don't need the magnets to be cryogenic.
- carabiner 3y agoUpdate from 2 hours ago https://twitter.com/floates0x/status/1687296154416066560 https://twitter.com/floates0x/status/1687296154416066560 "LK-99 Updates around the Korean Verification Committee: - Sample will not be released today/tomorrow - Group waiting on peer review (implied to be APL materials) and could take 2-4 weeks - Sample possibly with APL Materials, which is why it cannot be provided to verification committee - Team is asking the Verification committee for a detailed plan on how the committee intends to perform the verification before proceeding Now, Hyun-Tak Kim also issued the following quote in regards to the Korean Verification Committee: '돈을 빌려서 어렵게 사업하는 분들한테 와서 조직적으로 횡포를 부리는 것은 바람직하지 못하다"며 이같이 밝혔다'." Can anyone translate the Korean?
- Havoc 3y agoiPhone translate reckons > It is not advisable to borrow money and come to people who do business with difficulty and be organised and do tyranny," he said. Maybe he is frustrated with the verification process?
- samstave 3y agoThis is ELI5 stupid Q: What may be the benefit of running a sequence of "coils" or whatever the Loops may be comprised of such that the N/S to whatever polarity positions are required, could be an LK-99 then a super cooled, then an LK-99 etc... If it was in a toroidal spiral (everyone things of the trajectories as linear, but toroidals spirals are most efficient) you could have hybrid tracks - where maybe a linear launch is good, but a toroidal control for spins off routing is ideal (think a 3d roundabout - to launch vessels diff directions...
- samstave 3y agoWhat is we made coroidal spirals over a ferrit but in alternating polatities but we can control. I a m talking out my butt - thus a toiroidal wrapp where by the torioidal spin in induced trough a mecury spinning magnetic slurry... as basically a spinned slurry ...... But that just me...
- pcrh 3y agoWhat are the implications of this for global warming? Would we be able to ditch most of fossil fuel usage (eventually)?
- lifthrasiir 3y agoSo what the heck has happened with LK-99 really? (Disclaimer: I'm no physicist nor chemist, but I have co-written a report on three LK-99 papers [1] and am tracking the Twitter discussion as much as I can. I also got some help from knowledgable friends---much thanks for proof-reading.) It turned out that LK folks were not talking about some stupid shit. Specifically they were one of the last believers of long-forgotten Russian theory of superconductivity, pioneered by Nikolay Bogolyubov. The accepted theory is entirely based on Cooper pairs, but this theory suggests that a sufficient constraint on electrons may allow superconductivity without actual Cooper pairs. This requires carefully positioned point defects in the crystalline structure, which contemporary scientists consider unlikely and such mode of SC was never formally categorized unlike type-I and type-II SC. Professor Tong-seek Chair (최동식) represented a regret about this status quo (in 90s, but still applies today) that this theory was largely forgotten without the proper assessment after the fall of USSR. It was also a very interesting twist that Iris Alexandria, "that Russian catgirl chemist", had an advisor who was a physicist-cum-biochemist studied this theory and as a result were so familiar with the theory that they were able to tell if replications follow the theoretical prediction. Fast forward to today, students of the late Chair continued the research and produced a possible superconducting substance---LK-99---based on the Russian theory. A lot can be said about papers themselves, but it should be first noted that this substance is not a strict superconductor in the current theory. Prof. Chair once suggested that we need to trade off some (less desirable) properties of superconductors for room-temperature superconductivity, and that property seems to be isotropy. This particularly weakens the Meissner effect criterion due to the much reduced Eddy current, so there is a possibility that LK-99, even when it's real, might not be accepted as a superconductor in the traditional sense. LK folks on the other hand think they should be also considered a superconductor, but they are probably already aware of this possibility. If we allow anisotropy in this discussion, we do have lots of such things already, most importantly carbon nanotubes. Scientists even thought about the possibility that they may function as typical superconductors [2], without any success though. So it might be appropriate to say that LK-99 is a substance that mimics them in one direction, but much more malleable. And that is an actually significant result (if true, of course) because for most uses a strict type-I superconductor is far more than sufficient, while implications of superconductivity are more achievable. We so far looked for strict superconductors only because we didn't know the effective way to trigger superconductivity otherwise; LK-99 might change that situation. This whole discourse should make you more careful to conclude whether LK-99 is a superconductor or not, because we may well end up with a revised definition of SC as a result. If LK-99 makes superconductivity much easier to trigger it should be considered a superconductor in the macroscopic sense, authors would argue. Only the time will tell if they indeed made such a substance and it would be malleable enough to be substitutes for other superconductors, but they have a long history and arguably received unfair treatments. And they are about to fight back. [1] https://hackmd.io/@sanxiyn/S1hejVXo3 https://hackmd.io/@sanxiyn/S1hejVXo3 (Semi-automatically translated: https://hackmd.io/DMjYGOJFRheZw5XZU8kqKg https://hackmd.io/DMjYGOJFRheZw5XZU8kqKg) [2] For example, https://twitter.com/MichaelSFuhrer/status/1686960727544958977 https://twitter.com/MichaelSFuhrer/status/168696072754495897... ---- This post is now also available as a standalone version: https://hackmd.io/@lifthrasiir/lk-99-prehistory https://hackmd.io/@lifthrasiir/lk-99-prehistory & https://twitter.com/senokay/status/1687360854315151360 https://twitter.com/senokay/status/1687360854315151360
- shevis 3y agoWhat a time to be alive
- divs1210 3y agoHao Wu is an immunologist. I hope he isn't connected to Stanford's Nolan. LK-99 is weirdly connected to UFO lore, so I'd want to be cautious.
- ricardobayes 3y agoFor me it's also interesting how we closed the gap between scientific discoveries and the general public to know about them. With the advent of pre-print servers, you can read this basically "next day".
- tcmb 3y agoI see this as a double-edged sword, at best. There is a reason why papers used to be published only after they were peer-reviewed. Now the media are starting hype-cycles on unreviewed research results, just to get the ad impressions before anyone else does. But I'm not sure if they are as diligent about following up on these stories and making later negative result front-page news as well.
- deleted 3y ago[deleted]
- jjallen 3y agoOne somewhat ironic fact of this story is that the rogue former employee perhaps deserves some credit for bringing this thing out into the world. They had been working on this for quite a long time themselves, rightfully so. But now the whole world is working on it and exploring other methods and combinations of materials I would assume (to improve upon the original design and avoid any patents). How long would they have kept this thing to themselves without the rogue employee bringing this thing to light? Perhaps that was part of the rogue former employee's motivation in "going rogue": that this thing needs to see the light of day so it can start to benefit humanity.
- King-Aaron 3y agoHave you got any back-story on that? I only saw that their team posted it to arxiv, hadn't heard the other drama
- jjallen 3y agoA former employee was the first to publish a paper with only three authors. I am surprised you haven't heard about this. Then a few hours later a paper was published with six authors (without one of the original three authors), ostensibly by the core team that has been working on this. There should be much more detail on the Internet if you search for it.
- wetmore 3y agoI also hadn't heard about this for what it's worth.
- cthalupa 3y agoIt's one of the reasons people were thinking this might not be a fraud. Nobel prizes are capped to 3 people, and the speculation is that the rogue person published early to try and ensure they were one of the people that received it. No reason for infighting like that if you know it's a hoax.
- belter 3y ago"Some remarks on possible superconductivity of composition Pb9CuP6O25" - https://arxiv.org/ftp/arxiv/papers/2308/2308.01723.pdf https://arxiv.org/ftp/arxiv/papers/2308/2308.01723.pdf
- mensetmanusman 3y agoThis could have a huge impact on the feasibility of future quantum computers relying on exotic quasiparticles requiring stability at more practical conditions.
- qwerty456127 3y agoHow hard/expensive is this LK-99 to produce?
- lordnacho 3y agoI think the hype is more about this material demonstrating some principle that creates fertile ground for similar materials to be researched. Someone down the line will find something related that can be mass produced.
- mjaques 3y agoAlright folks calm down, the resistivity of LK-99 is higher than copper... https://twitter.com/bedoya_pinto/status/1686776302785773573 https://twitter.com/bedoya_pinto/status/1686776302785773573
- code51 3y agoWhat are the next best materials to test according to br-bcs theory?
- baxtr 3y agoHere is a good thread on what could be realized if we had room temperature superconducting materials at our hands: https://twitter.com/alexkaplan0/status/1684044616528453633 https://twitter.com/alexkaplan0/status/1684044616528453633
- ericswpark 3y agoTwitter (or X or Y or whatever the heck they're calling it nowadays) doesn't show replies if you're not signed in, which breaks all tweet threads. Amazing hostile UX right there.
- timeon 3y agoBasically useless link for anyone without login.
- panki27 3y agohttps://nitter.net/alexkaplan0/status/1684044616528453633 https://nitter.net/alexkaplan0/status/1684044616528453633
- wg0 3y agoWhat is the summary here? Did we find the superconductor or not and still under verification and replication?
- cdadelhi 3y ago[flagged]
- cdadelhi 3y ago[flagged]
- devX3 3y agoThis coming days/weeks are going to be exciting, I really hope we just witness the biggest breakthrough in physics or even science in recent decades.
- Ford__Prefect 3y agoPsssft, room temperature, Chuck Norris does it in his sauna.
- DoctorOetker 3y agoOn the following suppositions: 1: Superconductivity becomes widely confirmed 2: Reproducibility remains microscopic Imagine a game of rolling a collection of n dice (normal 6 sided), where the player wins if all N dice are 4 or higher (probability 1/2 for a single dice). Then the probability of a lucky roll is P = (½)ⁿ So the smaller the collection of dice the more likely a lucky roll becomes. Consider a hypothetical continuous production method of LK-99, where the fraction of wire in superconducting arrangement is a function of its thickness, more likely if thinner. Could one simply re-anneal (and possibly re-quench) a short non-superconducting section until we get lucky, then proceed to the next non-superconducting section? "Lucky annealing" fortune cookies?
- DoctorOetker 3y agoConsider the work of C. V. Boys. https://en.wikipedia.org/wiki/C._V._Boys https://en.wikipedia.org/wiki/C._V._Boys Especially: "On the Production, Properties, and some suggested Uses of the Finest Threads." 1887 https://zenodo.org/record/1431517/files/article.pdf https://zenodo.org/record/1431517/files/article.pdf This is a very entertaining read, and highly recommended. He produced extremely fine threads of glass, quartz, etc. finer than the visible light diffraction limit. (Which he would use to construct sensitive torsion balances) He was inspired by Peles Hair. (Volcanoes grow hair too...). He first describes electro-spinning and its limitations (uncontrolled growth of hair which mattes together). How did he do it? He used a miniature crossbow, modified so he could trigger it by foot pedal, leaving his hands free to work. He would first produce a small thin section by more conventional means, glue one end to a fine dart or arrow (a piece of straw really). In the next sentence "blowpipe" is not a launching device, but a device to heat a small sample to a high temperature. Then he would use a blowpipe and melt the piece of say quartz until a bead forms, at which point he would trigger the cross bow. As the arrow of straw shot away it draws the bead of melt to a long fine thread. Perhaps this can be modernized to vacuum or inert atmosphere, melt the quasi LK-99 sample until it beads, then shoot away. Rewind the resulting thread and re-anneal any non-superconductive segments.
- mnemotronic 3y ago_Perhaps this can be modernized to vacuum or inert atmosphere, melt the quasi LK-99 sample until it beads, then shoot away. Rewind the resulting thread and re-anneal any non-superconductive segments._ Another use-case for the Baltimore shot tower (https://en.wikipedia.org/wiki/Phoenix_Shot_Tower https://en.wikipedia.org/wiki/Phoenix_Shot_Tower)
- dwighttk 3y agoIf you believe it there’s money to be made https://polymarket.com/event/is-the-room-temp-superconductor-real https://polymarket.com/event/is-the-room-temp-superconductor...
- aqme28 3y agoI've been wondering why the market didn't really respond to this. It dropped a lot on the previous articles where the Tc was around 110K, so I'm curious why it has stayed relatively flat here.
- monkpit 3y agoHasn’t this already been done by several groups? It’s the first paper but it’s old news now.
- p-e-w 3y agoThis is the only website I actually trust to give me an accurate picture of where we stand on LK-99. As long as the blue line doesn't cross the red one, I won't believe in it. Money talks, bullshit walks.
- asddubs 3y agocan we please stop spamming this?
- Roritharr 3y agoThe Varda Team just posted a really high-resolution video of the diamagnetism: https://twitter.com/andrewmccalip/status/1687405505604734978 https://twitter.com/andrewmccalip/status/1687405505604734978
- thomasmg 3y agoNice! For show, I would try to levitate. Probably using a stronger magnet, inside a small (tiny?) glass tube, so it slides up a bit. I wouldn't do "rock surgery" just yet, to remove dead weight. Levitation with 4 magnets in a checkboard fashion, as usually done for pyrolytic carbon sheets, maybe doesn't work as the sample is not flat. Also, turning the magnet upside down seems useful. And then, heating up to show that it drops at a certain temperature. I wonder what would be needed in this case; I guess less than 100° C. In any case, the "show" part is important. Good video quality is important.
- panki27 3y agoFinally a video with quality that doesn't look like it was filmed with a camcorder from the early 2000s.
- tetris11 3y agoNitter link: https://nitter.net/andrewmccalip/status/1687405505604734978#m https://nitter.net/andrewmccalip/status/1687405505604734978#...
- stronglikedan 3y agoIt's cool that they left the dialog in there.
- pmontra 3y agoNoob question: if whatever is happening is strong enough to raise one of the ends of the sample, why doesn't raise both? After all gravitation is many order of magnitudes weaker than electromagnetism. Did they calibrate the setup to closely match the gravitational force on the sample? Why not push a little more and make it fly up the the cap of the container?
- rkachowski 3y agofor complete tourists like myself, does this represent conclusive evidence of superconductivity in this sample or does it require more?
- djoldman 3y agoAny process chemists here care to comment on this synthesis? I'm craving more information from these papers on the synthesis: weights, sources, purities, and powder sizing of precursors, models of ovens, glass details, etc. etc. When there's clearly big and important differences between everyone's outputs using the "method similar to that reported by Sukbae Lee et al." then it's important to know every detail!
- test_user__1234 3y agohello
- test_user__1234 3y agolol
- djoldman 3y agoAnyone more qualified than me care to comment on whether the picture in figure 1c, which shows what appear to be pure copper islands on the outside of the material, supports the idea of a heterogenous material in that the reaction either wasn't complete or resulted in impure output?
- oblio 3y agoFor newbies, what's the potential impact of this discovery? Electronics? Better electrical stuff in general? What else?
- Mizoguchi 3y agoIt's likely we will be able to grow full working organs, tissues and limbs in a lab before we can reanimate frozen bodies. So wouldn't be more efficient to cryopreserve only the brain?
- ChatGTP 3y agoDoes anyone else just upvote stories like this because you know everyone else is up voting ? It has that nerdy, must up vote even if you don't get it vibe about it.
- kingkongjaffa 3y agoNot to be anti Eastern or anything but are there any results from the global west being worked on? Say a university in the US or UK /Europe? I have no reason to doubt the quality or integrity of research published elsewhere but I would love to see some research from multiple sources including a diverse geography.
- 10xDev 3y agoYou will find them on Twitter discussing politics.
- erlich 3y agoI love how the nytimes front page is just all Trump and political crap. Literally not a word about this, and if it's real, its like the biggest thing ever.
- anonylizard 3y agoNYT actually is the only newspaper outside of Korea to get into contact with the authors, and received an exclusive video from the professor. Go to their science section. Now it isn't top news, but when it is confirmed, it'll be front page news on every western newspaper.
- erlich 3y agoThis furthers my point. They even got an exclusive and still run Trump stuff.
- hackerlight 3y agoYeah sure, but you're singling out them as if it's not the case with every mainstream media outlet. We already know that this type of story isn't what drives revenue and that's why it's not on the front page.
- devin 3y agoNow measure resistance.
- raffraffraff 3y agoSo, hoverboards? Excellent.
- softwaredoug 3y agoI no nothing about superconductors. And have been largely ignoring this until it seemed more certain. Can someone ELI5 why this matters? What does it enable technologically? Flying cars? Fusion reactors? Magic fix for global warming?
- trolan 3y agoNo resistance in wires means limitless power lines, phone lines, batteries charge instantly..
- tartrate 3y agoNow how about some practical implications rather than theoretical?
- moolcool 3y agoMRI machines will get much better/cheaper. They use superconductors already, but are very hard and expensive to keep at their super-cold operating temperature.
- shivekkhurana 3y agoHoverboards.
- moolcool 3y ago> batteries charge instantly Correct me if I'm wrong, but wouldn't there still be a bottleneck on the battery chemistry itself?
- mk_stjames 3y agoThis is obviously a quickly produced paper to get the finding out but.... I find there to be so much missing and so many things poorly worded or posed about their process that would have taken zero time to expound upon, it's infuriating. "All the reactions are carried out under 10^-2 Pa" OK, I know they mean 10^-2 of vacuum. But why not say that? "10^-2 Pa" isn't enough. Was this a full vacuum oven? Done in sealed quartz vials? Was there a purge, like argon, or just air? If you look at the oven temperature profiles, you can see the ramp up time (0-2hr, 0-2hr, and 0-4hrs respectively), and the hold time, but the ramp down time isn't specified! There is no cooling rate, it just shows... a line drop off, with no end time. No label. This can be very critical. Were these just pulled straight out and air quenched? And were they kept under vacuum until at room temp or not? Like, adding extra experimental setup details would take no time whatsoever to include in a paper and yet these researchers just don't do it. It's either pure fucking laziness or some sorta holier-than-thou gatekeeping that comes from theoreticians, or a combination, and it is the reason that replication is so hard in science right now. I would hope that no journal would accept this shit.
- deleted 3y ago[deleted]
- dmix 3y agoWhat personal benefit does this gain someone to publish it so quickly? Is it just social media attention?
- elfbargpt 3y agoEDIT: This is probably fake. The account was just created and can't find any info online. Also the pellet returns to its starting position for some reason. Just saw another unconfirmed replication here: https://twitter.com/instsondaw/status/1687433935012139008?s=20 https://twitter.com/instsondaw/status/1687433935012139008?s=... Found their process really fascinating, apparently they create L-99 powder, sort it by meissner effect, then press the "high meissner effect" powder together
- soligern 3y agoInteresting. So this doesn’t exhibit flux pinning then.
- baq 3y agoPeople called the Soviet anime lesbian kitchen chemist a LARP but this is either Nobel or a fraud, personally very heavily leaning towards fraud.
- pineconewarrior 3y agoI tried searching this strange string of nouns but was met with some strange results. What are you referencing?
- voqv 3y agohttps://news.ycombinator.com/item?id=36938648 https://news.ycombinator.com/item?id=36938648
- throwaway60707 3y agoProbably https://twitter.com/iris_IGB/status/1685731177523449856 https://twitter.com/iris_IGB/status/1685731177523449856
- deleted 3y ago[deleted]
- gcr 3y ago
- dmitrybrant 3y agoCan I ask why we're using a special definition of "levitation" that doesn't really mean levitation? I'm finding it very annoying to click headlines that say "Levitation of LK-99!", and... ohh it's still standing on one end. I'm sure this is a promising discovery and everything, but saying "levitation" at this stage is very forward-looking, and for me - a bit cynicism-inducing.
- John23832 3y agoI would assume that this is because of the lack of purification of the samples. A fully pure sample would probably fully levitate. Given the rush to recreate and lack of purity, if a portion levitates (causing standing on one end) you could assume a pure sample would fully levitate.
- xwdv 3y agoIs a perpetual motion machine now possible with a room temp superconductor like this?
- mderazon 3y agoDon't think so. Friction, at least, is still unavoidable
- Out_of_Characte 3y agoAFAIK superconductors are ideal conductors, therefore the electrons will remain in motion unless acted on by a force. So yes.
- 0x01DEED 3y agoAssuming this is indeed the holy grail of superconductivity... can someone with knowledge on manufacturability of these materials, suggest a prediction of when the specific LK-99 material would be ready for mass production? Is it ~3 years from now or more like ~15 years from now?
- foota 3y agoI'm not what you're asking for, but almost certainly closer to 3 than 15. If it's the real deal, I imagine we have industrial capacity to make a superconducting material within 5 years. The required supplies are readily available, and while production of this particular material seems difficult, there's like a whole new field of materials to find, with very strong incentives. China would love to lead the world in a new branch of material science.
- charlieyu1 3y agoIt is getting crazier every second it passed. Multiple labs trying to replicate and everyone get a different result. The only thing we know is that LK-99 is something that nobody understands
- dinvlad 3y agoI just hope it’s not the new graphene
- Robotvacuum 3y ago[dead]
- ABuddy4u2 3y ago[flagged]
- Simon_O_Rourke 3y agoFantastic news!!! Kudos to all concerned and looking forward to the levitating automobiles!
- low_tech_punk 3y agoMy excitement in this breakthrough raised the room temperature by 1 degree.
- mnemotronic 3y agoWhat are the implications of this, assuming it's true? I'm ignoring the controversy over Chinese scientific paper publishing. Aside from a fidget spinner, how would near-ambient superconducting magnetic levitation impact me?
- mrahmadawais 3y agoI truly hope this happens, can't wait to see the amazing impact it will have in our lives.
- Lewton 3y agoDisclaimer, I have not vetted this at all, but if anyone is up for speculative excitement, this is the video to watch: https://m.douyin.com/share/video/7263715495256378659 https://m.douyin.com/share/video/7263715495256378659
- omnicognate 3y agoI know nothing about any of this but even I can tell that's on a spring. It's not supposed to twang back into position like that.
- Lewton 3y agoAccording to the people I know, who do know things, it's not uncommon to require some force for a superconductor to move while pinned and that it can experience 'snapback' (Don't get me wrong, I think there's a significant chance that it's fake, but I've been told that if it is in fact a superconductor this is very much how it would move)
- Lewton 3y agohttps://youtu.be/R2Hy6F_8n58 https://youtu.be/R2Hy6F_8n58 Notice how much force needs to be applied to move a real superconductor into a new pinned state
- ezekiel68 3y agoI want to believe. Yet I've got this old song[0] going through my head... I'll tip my hat to the new constitution Take a bow for the new revolution Smile and grin at the change all around Pick up my guitar and play Just like yesterday Then I'll get on my knees and pray We don't get fooled again [0] "Won't Get Fooled Again" by Pete Townsend of The Who
- amai 3y agoI believe this is the first paper on arxiv that links to www.bilibili.com: Supplementary video 1：Meissner effect for sample 2. https://www.bilibili.com/video/BV14p4y1V7kS/?spm_id_from=333.999.0.0&vd_source=510b6ea https://www.bilibili.com/video/BV14p4y1V7kS/?spm_id_from=333... c8fec748481fb4b933932e80c Supplementary video 2：Exclude ferromagnetism of sample 2. https://www.bilibili.com/video/BV13k4y1G7i1/?buvid=XY81B1F843E91B69C1CC4563365B5FCE3 https://www.bilibili.com/video/BV13k4y1G7i1/?buvid=XY81B1F84... A291&is_story_h5=false&mid=jLEqsyica5eHkvtMXQ2K1A%3D%3D&plat_id=193&share_from=ug c&share_medium=android&share_plat=android&share_source=QQ&share_tag=s_i×tamp= 1690894807&unique_k=B6gawMH&up_id=7590247
- fennecfoxy 3y agoNot only is this cool to watch and I'm crossing my fingers that their claims are legit, but it is always so cool to see those moments in science where the whole world comes together to work on something. Is this excitement and teamwork what it really means to be human?