39 ms·
A room-temperature superconductor? New developments
- bhewes 3y agoThis would be huge for increasing energy density in Manhattan. Holbrook Superconductor Project uses liquid nitrogen to cool.
- floxy 3y agoOooh, citogenesis in action.
- FrustratedMonky 3y agoForget posting with a year, or month, or day. These stories need a time-stamp. Who replicated or not since this morning.
- cududa 3y agoThe time stamps are below the post’s title
- deleted 3y ago[deleted]
- FrustratedMonky 3y agoYou know how sometimes people complain about an old story, and say put year in the title, like this. (2014) Some Title What is below the title is a time since posted, not the date of the article. This was a joke. Since there are multiple submittals every hour today about this story. So need something like (8/1/2023 10AM) Yet Another Story, about another group, with claim about Replication of Superconductor
- hinkley 3y agoYou'll never get that through committee. It'll get hung up on which time zone to use.
- firatkizilboga 3y agoI want to believe
- nick__m 3y agoYou are not alone !
- sandworm101 3y agoAnd a great many people also want you to believe. Just remember: don't give anyone any money, not until this is properly verified.
- Night_Thastus 3y agoWho could you possibly give money for this? It's not like there's a as-seen-on-TV ad for superconductors. But I agree that it needs a healthy dose of skepticism until several reputable groups have replicated it.
- ncallaway 3y agoNo one’s selling a retail product now, but there’s definitely going to be investors speculatively pushing money into the space
- p1mrx 3y agoAre you tired of stuff sitting on the ground like yesterday's news? Introducing Hovertape, the super-productive superconductor. Now for only 12 easy payments of $19.95, you can make almost anything float. If you order now, we'll throw in 3 rare earth magnets absolutely free!
- forgotusername6 3y agoThis reminded me of the Sirens of Titan. The main character makes some bad investment decisions, including in hovering furniture that wobbles uncontrollably when touched.
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- scarmig 3y ago"Guardedly optimistic"!
- ck2 3y agoI will never get tired of this story (and fresh Derek Lowe) PBS had a documentary about the possibilities way back in the 1980s and I still remember it It won't change things overnight or even this year but the benefits to humankind will be huge eventually. (and we'll need more power transmission more cheaply for all that extra air-conditioning we'll need unfortunately)
- deleted 3y ago[deleted]
- drexlspivey 3y agoNew replication video coming from China https://twitter.com/lereguy/status/1686363900651151360 https://twitter.com/lereguy/status/1686363900651151360
- ChoHag 3y ago[dead]
- zevv 3y agohttps://nitter.net/lereguy/status/1686363900651151360 https://nitter.net/lereguy/status/1686363900651151360
- RandallBrown 3y agoCan someone explain how this video shows superconductivity?
- 7moritz7 3y agoIt shows the magnetic effects associated with superconductors, which are omnidirectional from my understanding, in contrast to a 'regular magnet'
- declan_roberts 3y agoThere's all kinds of cool examples of this using liquid nitrogen to make a superconductor exhibit the Meissner effect. The material in question will have these effects at room temperature and pressure. https://youtu.be/HRLvVkkq5GE?t=53 https://youtu.be/HRLvVkkq5GE?t=53
- mrtksn 3y ago[not an expert but...]It shows strong diamagnetism(being repelled by both of the poles of a magnet), which is a property of superconductors. Not necessarily a superconductor though, that’s still to be established but at least it shows that the inventors are up to something and it’s not complete fabrication.
- 3y ago
- hcks 3y ago[flagged]
- cardosof 3y agothis changes everything (if it's true)
- scythe 3y agoI'm glad to hear that I'm not the only one who thought that the DFT computational preprints were very promising. Unfortunately, they also indicate that the desired substitution will be very hard to achieve — crucially, the "crush and separate the composite" suggestion a few commenters have made is unlikely to work, since the heterogeneity exists within the same crystal, depending on whether Cu substitutes into Pb {1} (good) or Pb {2} (bad) crystal sites. This may be why the very oblique synthetic approach favored by the authors — reacting copper phosphide with lanarkite, giving lots of copper sulfide byproduct — was needed to give interesting properties. Now that we have an idea of what to look for, though, it may be possible to derive other synthetic approaches with a clear idea of what particular sort of copper substitution should be achieved, and a way to determine if it was achieved. Of course, there remains a possibility that all of this is a big mistake, but now it would have to be several correlated mistakes. It may be a long time until the necessary selective substitution is achieved in a high-quality bulk sample, so, going on this hypothesis, I do not expect a sudden rush of new technologies in the near-term.
- gaze 3y agoKinda? You'd expect flat bands from putting a copper atom into a big insulating supercell. The population of the d band is interesting, though. I don't find it super super compelling, but it's certainly not nothing.
- radioactivist 3y agoYes, given the Cu atoms seem to be ~8 Angstrom apart the flat bands are to be expected. So its not clear what "special" about these, given if you just had dilute Cu impurities in some otherwise insulating I'd imagine you'd have something similar for the Cu d-bands.
- calf 3y agoCould there be limitations to making a large piece of this crystal, so in practice it is never useful?
- ironborn123 3y ago
- Ajay-p 3y agoI still have a very, very hard time understanding what all of this means. Is there an easy to understand explanation for a room temperature superconductor?
- lalopalota 3y ago[flagged]
- dustincoates 3y agoFrom the HN guidelines: > Be kind. Don't be snarky. Converse curiously; don't cross-examine. Edit out swipes.
- fredoliveira 3y agoIt takes very little to try and explain a concept to someone asking for pointers — assuming of course, you know the topic at hand. Your response is as unhelpful as it gets.
- TX81Z 3y agoHN tends to be a place where many technical experts explain complicated things succinctly because they know the audience here has a certain baseline of knowledge. I scrolled down until I found this question (as I have the same "huh, what is this anyway?" reaction). Because I'm a "Very Busy Person" and don't actually have all day to screw around with "every YouTube video", I come to HN to optimize my time spend/information gained ratio. Likewise, on this topic, even the above is still confusing. People say it's more efficient, then replies say we're already at 95-99% efficiency so it doesn't matter much. I'm still fairly confused!
- TheJoeMan 3y agoEver seen one of these high school science demos?: https://www.youtube.com/watch?v=AWojYBhvfjM https://www.youtube.com/watch?v=AWojYBhvfjM Now imagine one where you don't have to chill it with liquid nitrogen.
- 3y ago
- SanderNL 3y agoThis is exciting, but I try to maintain my composure. Good luck to all involved. I didn’t know science could be such a thrilling spectator sport.
- declan_roberts 3y agoThe fun part about this is how easy things are to grasp even though I have zero background in the science.
- kijin 3y agoIt certainly doesn't hurt that this thing levitates. No need to squint into a microscope, parse a screen full of numbers, or try to make sense of false-color renderings. Either you have video proof of a levitating object, or you don't. The demonstration is as intuitive as it gets, despite the fact that the theory is crazy difficult to wrap one's head around.
- itsarnavb 3y agoAnd the techniques to produce the material are not too crazy, all within reach of sufficiently dedicated amateurs
- dclowd9901 3y agoLevitates? Against, what, the earth's inherent magnetic field? Sorry, I haven't seen any visuals that show this behavior.
- anyoneamous 3y agoMostly, I am just glad that all the LK-99 posts are drowning out the "AI" news for a few days.
- twoquestions 3y agoEven if this doesn't pan out, I'll dare to hope we get useful stuff out of this, like how we got Duct (duck?) tape and silly putty. If it does, hoo boy!
- bugglebeetle 3y agoWith all the recent “the government has alien spacecraft news” and the bizarre circumstances of this material’s creation, the (I know to be ridiculous) conspiratorial part of my mind is going “I guess climate change is finally forcing them to take stuff out of the extraterrestrial vaults.”
- weard_beard 3y ago... or Gödel was right and the universe spins and backward time travel is possible and they got permission to pull some future inventions out of the vault retrieved from future us ... in order to make sure we actually make it to future us ... which we should ... because the inventions are real ...
- bugglebeetle 3y agoThis one is fun too.
- hilbertseries 3y agoSo they planted this with a Korean lab a few years ago?
- bugglebeetle 3y agoPlease see “I know to be ridiculous” in my comment. This was intended as a joke.
- hinkley 3y agoI mean we do have a defense pact with South Korea... There are worse places to establish parallel discovery. Plausible enough for science fiction at least.
- BirAdam 3y agoHaving known many conspiracy theorists... yeah. Given the US troop presence in Korea, they would say "absolutely," and they'd then adjust their tinfoil hats.
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- mk_stjames 3y agoI would be interested to see the daily order numbers on Sigma Aldrich's supplychain website for Lead II Oxide and Copper Phosphide powder in the last week....
- russellbeattie 3y agoI wonder if this is just summertime boredom combined with social media blowing an interesting development out of proportion, or if we're actually witnessing history in real time? Also, what are the chances this is like another graphene, where it can do everything except get out of the lab?
- Exuma 3y agoI’m also wondering this. People keep saying this is as big as transistors and the Iron Age and so far the only examples I see are slightly more efficient power. The quantum computing one seemed like the only potentially huge benefit. But what do I know
- vasco 3y agoHow likely is this to lead to breaking all encryption by enabling way bigger superconducting quantum computers with way more qubits than are reasonable nowadays? Is this just going to turn into cyberwar on steroids?
- scythmic_waves 3y agoThere are post-quantum-computing encryption schemes [1], thankfully. [1]: https://en.wikipedia.org/wiki/Post-quantum_cryptography https://en.wikipedia.org/wiki/Post-quantum_cryptography
- LordDragonfang 3y agoThat still leaves all encrypted traffic on the current internet vulnerable to a store-and-decrypt-later attack, which is more concerning the nearer that "later" is.
- Nmi2osv7 3y agowhich is happening in room https://en.wikipedia.org/wiki/Room_641A https://en.wikipedia.org/wiki/Room_641A for decades, all https traffic has been stored, and ones that use rsa (most of them) will retroactively be unveiled once we have shor's algorithm
- deleted 3y ago[deleted]
- ouid 3y ago[dead]
- Strilanc 3y agoJust because you could operate superconducting qubits at high temperature doesn't mean you would. By far the biggest problem for qubits is noise, and raising the temperature would increase noise. I won't claim a high Tc superconductor can't help... but my gut reaction is that it's irrelevant to the actual engineering issues as they currently stand.
- ssijak 3y agoThird replication on some Chinese website https://www.zhihu.com/zvideo/1669820225079070720 https://www.zhihu.com/zvideo/1669820225079070720
- orangepurple 3y agoDescription by the author, translated by Google Translate: I need to clarify and explain: the sample is standing above the magnet, and it will immediately return to standing when pressed with tweezers in front of the video, similar to the anti-magnetism of Koreans. In the back of the video, because the sample is too small, I dare not push it with tweezers, and it is easy to break the sample, so I moved the paper a little sideways, and it can be seen that the sample is still diamagnetic, and it is not that the moving magnet is moving with the magnet. Whether it is related to flux pinning or superconductivity remains to be further verified. Please treat it rationally! Original: 我需要澄清和解释一下：样品在磁铁上方是站立着，视频前面用镊子去压它马上又恢复站立状态，类似韩国人的抗磁性。视频后面因为样品太小，没敢用镊子去推，容易把样品搞碎，所以稍微横移了一下纸张，可以看到样品还是呈抗磁性，并不是移动磁铁跟着磁铁在移动。是否属于磁通钉扎或者超导相关还有待进一步的验证。请理性看待！
- fHr 3y agook this is very exciting to hear
- MillionOClock 3y agoIf it's real, how fast could we see concrete applications using this material? 5-year time frame? 10-year time frame? More?
- radicaldreamer 3y agoNobody knows, it depends on a multitude of factors, but most likely this won't be the exact material which will have applications, I'm sure there is a much easier to fabricate related material which will be the first of a whole set of materials which act as superconductors at room temperatures.
- moffkalast 3y agoWhy be so sure about that? I really hope it doesn't turn out to be graphene 2.0, a material that can revolutionize everything but can't be produced consistently and in usable quantities by any means at all.
- distortionfield 3y agoYeah, this feels like the really early results of a material that they eventually refine into a process, hence their patents. There are reports they were worried about being beaten to the punch, im curious if that’s true and if so, who the word on the street said was close.
- brucethemoose2 3y ago> if you could grow a good single crystal of LK-99, it seems as if the superconductivity might only occur along one crystal axis: put crudely, you'd see superconductivity if you hooked your wires to two particular opposite faces of said crystal, but not to the others! Crystalline grain boundaries are already known to be a big deal in the efficiency of existing superconducting materials, and this would mean that polycrystalline samples of LK-99 would be pretty unfavorable to demonstrating robust effects. I think this means production of usable superconducting masses will be tricky, if its even possible. So... Probably on the longer side? Time will be needed to figure out how to make it macroscopically, or discover a similar compound thats easier to produce in bulk. But once wire, coils, high purity samples and such start getting sold, I think the adoption would be very quick.
- zootreeves 3y agoI haven’t been this excited since the EmDrive
- MPSimmons 3y agoWhich should honestly be a warning sign.
- marcusverus 3y agoWhy is that?
- suby 3y agoThe EMDrive didn't pan out.
- declan_roberts 3y agoDoes LK-99 defy the laws of physics like the EmDrive did?
- zamadatix 3y agoA room temperature and pressure semiconductor is more an astoundingly large jump forward in the space than something that defies known physics.
- distortionfield 3y agoThat doesn’t track. The EmDrive was legitimately pushing a premise that we had some fundamental law of physics wrong. Superconductors are pretty well understood, they’ve been around for a while. Finding a room temperature one isn’t that big of a jump, it’s just a really hard one to make.
- mitthrowaway2 3y agoYou're in agreement with the GP, their comment was just hard to parse.
- mrandish 3y ago> They also predict that substituting gold atoms into the Pb(1) site could lead to a material with very similar properties, which will be an extremely interesting idea to put to the test. Since the base material is lead apatite, I had a random thought that maybe medieval alchemists trying to turn lead into gold just had it backward, as doping gold into lead might be a breakthrough. :-)
- itsarnavb 3y agoNow I'm imagining what history would have looked like if the alchemists had indeed stumbled upon a floating lead apatite sample a few centuries ago...
- javajosh 3y agoGood idea! They wouldn't have been able to do any applications without a voltaic cell, and it would have been a novelty. Like gunpowder in ancient China.
- deleted 3y ago[deleted]
- ASalazarMX 3y agoThe force of tradition is amazing. Imagine centuries knowing how to make something that explodes violently, and using it for entertainment instead of weapons. Just like how Mesoamerican civilizations invented the wheel, but only used it on children toys and not for transportation. There were no draft animals in the region, but they didn't even make wheelbarrows. https://www.mexicolore.co.uk/aztecs/home/the-concept-of-the-wheel-in-ancient-mesoamerica https://www.mexicolore.co.uk/aztecs/home/the-concept-of-the-...
- mvalente_ 3y agoIs there a name for this kind of effect?
- deeg 3y agoI'm astounded that the MSM seems to be ignoring this ATM. I did a Google news search on LK-99 and saw nothing from major publications. A search on the NYTimes returned an article from 1974.
- declan_roberts 3y agoI think them waiting until there’s more research is preferable to them coming out and making random claims which pan out not to be true.
- adamsb6 3y agoWait wait wait... Are eggs healthy again?
- tills13 3y agoThat hasn't stopped them in the past...
- ygjb 3y agoI think it's more likely that the bulk of folks don't fully comprehend why this would be so important. I would imagine alot of reporters look at the things they could write about and the choices are politics, war, polarizing news, or nerds nerding hard trying to prove other nerds right or wrong, and it just doesn't make the cut.
- refulgentis 3y agoNo...that's not the case here, to wit, we can observe writers from these publications discussing it casually.
- zgluck 3y agoThis plus vacation time in the Northern hemisphere - that one science reporter per large news org who actually understands the importance is AFK.
- lolinder 3y ago
- badman2001 3y agothe dft results are definitely interesting, but i note that with the caveat that my background is in experimental condensed matter physics for materials like this and not theoretical, my understanding is that the dominant feature of the conclusions (the flat bands) is a necessary but not sufficient condition for superconductivity in the way the authors describe. again, in experimental condensed matter physics it's acceptable to do a fine experiment and then throw in a half-baked "theoretical underpinning" to appease reviewers, so I wouldn't be surprised if the superconductivity turns out to be totally unrelated to the mechanism proposed in the paper. i would really like to see some more robust characterization work(biased because this is my background), hopefully some of the labs doing the replication studies can take a look at the juicy stuff
- adw 3y agoI know some DFT (*), but very little superconductivity, but I read through Sinéad Griffin's preprint and there was nothing in there which looked weird from a methodological perspective – and the methods (and software) she is using are extremely well-established and well-categorized. (*) it was, like, two decades ago, but I've got a first-author PRB paper so I wouldn't trust me compared to an active researcher but I'm not _entirely_ clueless
- foven 3y agoSomething that I find hard to understand is why there is superconductivity without cooper pairs; granted my understanding is related to more traditional superconductors and I'm not really very knowledgeable about the cutting edge high-Tc stuff.
- montecarl 3y agoThe thing that stands out to me is that the DFT simulations show that the flat bands only occur in a particular crystal structure of the material and it is not the most stable state (at least according to the simulation). This would explain the synthetic challenges involved. These simulations are not perfect, but they can be VERY useful when guided by experiment and when they correlate strongly it is a good sign that you have a mechanistic explanation of the phenomenon.
- pvsukale3 3y agoI am glad this is getting more attention. Maybe it will replicate, maybe it will not, or maybe we will find something new. But happy that this is in the news cycle.
- deleted 3y ago[deleted]
- dang 3y agoThe major threads so far, in reverse order—have I missed any? Huazhong University demonstrates LK-99 diamagnetism - https://news.ycombinator.com/item?id=36953819 https://news.ycombinator.com/item?id=36953819 - Aug 1, 2023 (265 comments) LK-99 crystal verified to be magnetically levitated (with video) - https://news.ycombinator.com/item?id=36953396 https://news.ycombinator.com/item?id=36953396 - Aug 1, 2023 (10 comments) Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2 - https://news.ycombinator.com/item?id=36952894 https://news.ycombinator.com/item?id=36952894 - Aug 1, 2023 (272 comments) Origin of correlated isolated flat bands in LK99 - https://news.ycombinator.com/item?id=36951815 https://news.ycombinator.com/item?id=36951815 - Aug 1, 2023 (196 comments) Semiconducting Transport in LK99 reproduction attempt - https://news.ycombinator.com/item?id=36951140 https://news.ycombinator.com/item?id=36951140 - Aug 1, 2023 (245 comments) LK-99: The live online race for a room-temperature superconductor - https://news.ycombinator.com/item?id=36940323 https://news.ycombinator.com/item?id=36940323 - July 31, 2023 (619 comments) Ask HN: Room temperature superconductor: what to expect? - https://news.ycombinator.com/item?id=36930707 https://news.ycombinator.com/item?id=36930707 - July 30, 2023 (61 comments) “We are not cheating” (YH Kwon superconductor comments) - https://news.ycombinator.com/item?id=36929386 https://news.ycombinator.com/item?id=36929386 - July 30, 2023 (61 comments) Korea Superconductor Papers Published ‘Without Consent’ - https://news.ycombinator.com/item?id=36927216 https://news.ycombinator.com/item?id=36927216 - July 30, 2023 (47 comments) Argonne National Lab is attempting to replicate LK-99 - https://news.ycombinator.com/item?id=36916254 https://news.ycombinator.com/item?id=36916254 - July 29, 2023 (201 comments) LK-99 - https://news.ycombinator.com/item?id=36897300 https://news.ycombinator.com/item?id=36897300 - July 27, 2023 (58 comments) Superconductor news: What’s claimed, and how strong the evidence seems to be - https://news.ycombinator.com/item?id=36881808 https://news.ycombinator.com/item?id=36881808 - July 26, 2023 (471 comments) The first room-temperature ambient-pressure superconductor? - https://news.ycombinator.com/item?id=36864624 https://news.ycombinator.com/item?id=36864624 - July 25, 2023 (875 comments) Edit: thanks to mystery user for emailing hn@ycombinator.com to suggest we include the days, not just month/year, for fast-moving stories like this.
- irthomasthomas 3y agoAny idea why the Science article links to a HN post as the source? https://news.ycombinator.com/item?id=36953396 https://news.ycombinator.com/item?id=36953396 (10 comments)
- xutopia 3y agoI'm not a scientist but how does this demonstrate anything? It just looks like a magnet is moving some metallic object. Can someone explain like I'm a five year old?
- DistractionRect 3y agoSo what's happening is they are demonstrating diamagnetism. Basically when exposed to an external magnetic field, that field induces a response in the material that repels it. When people think of magnetism, they think of polar charges that either attract or repel other polar charges. Diamagnetism is neat in that regardless of the orientation and polarity of the external field, a diamagnetic material is always repelled. Now why this matters. All superconductors exhibit diamagnetism, but not all diamagnetic materials are superconductors. So this lends credibility to lk-99 being a potential super conductor because they have been able to show it has one of properties of a superconductor. But we're still far off from showing it is a superconductor. That will be harder because impurities and other factors can confound the results, so right now the focus is on synthesis and confirming some of the easier properties we expect to see
- lolinder 3y agoSo why is everyone getting so excited about superconductors when all we actually know is this (probably) exhibits diamagnetism? Is diamagnetism super rare outside of superconductors?
- emtel 3y agoIt's rare for it to be strong, from what i've seen. Based on the videos that have been shown, it appears that it would be the most strongly diamagnetic substance (other than superconductors) known by a wide margin. In comparison, levitating things like pyrolytic graphite seems to require truly massive magnets to achieve even millimeters of levitation: https://www.youtube.com/watch?v=VC3r9-OaWes https://www.youtube.com/watch?v=VC3r9-OaWes
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- gtsnexp 3y agoFailed attempt to replicate: Semiconducting transport in Pb10-xCux(PO4)6O sintered from Pb2SO5 and Cu3P https://arxiv.org/ftp/arxiv/papers/2307/2307.16802.pdf https://arxiv.org/ftp/arxiv/papers/2307/2307.16802.pdf
- epistasis 3y agoI would expect to see such failed replications even if LK99 is the real deal. Getting the exact conditions correct for any sort of novel lab science is non-trivial, and often times the crucial variables might not even be measured in initial publications. People use this fact to try to bash things like cancer research, but it is unfortunately just a fundamental problem of science. Scientific publications are not kernels of distilled truth, they are work-in-progress commits. If we waited to publish until every last detail is known, science discovery would slow to a snails pace and we would miss a ton of discoveries.
- greggsy 3y agoThese are just as important as successes, as they build knowledge about what is not possible.
- TheAceOfHearts 3y agoAlways gotta be careful about what we record as not being possible though. Just because some research claims something isn't possible doesn't always guarantee the claim is accurate. If some factors are mistakenly overlooked, it's entirely possible that something which is actually doable becomes regarded as impossible.
- carabiner 3y agoGood reason to believe what the Chinese synthesized is far way from what the Koreans characterize as LK-99: https://twitter.com/robert_palgrave/status/1686394096410148864?s=46&t=N5oP9SrFuyxd0pRLixzkBQ https://twitter.com/robert_palgrave/status/16863940964101488... They tested a different substance.
- carabiner 3y agoBest way I've heard the DFT preprint described: "You know those spam pop sci websites where they find a study in which a specific cancer cell is killed by a certain drug and then go to print an article titled ‘SCIENTISTS CURE CANCER’. This is a similar situation." by https://www.reddit.com/user/giantraspberry https://www.reddit.com/user/giantraspberry. The preprint doesn't mean much.
- wut-wut 3y agoHa! "Headless Poultry Mode myself".
- jtchang 3y agoThe ramifications of the inflection point we are currently at is mind boggling. I had a hard time explaining this last night but we may very well be witnessing the beginnings of a technological transformation era much like when the p-n junction was invented. From the 1940s standpoint it would be hard to envision all we had today. - Lossless transport of energy - Batteries that don't take any time to recharge - Faster CPUs. Much faster with no heat to burn your lap. Can I have my flying car now?
- klysm 3y ago> Batteries that don't take any time to recharge Huh? Is this actually a thing that this enables? I don't initially see how
- idontpost 3y ago[dead]
- derefr 3y agoResistance is what makes things hot, and heat is what makes dumping huge amounts of charge current into batteries a bad idea. No resistance → no heat → no need to charge with low current†. Another way to say it is that, with a superconducting wire, you can make the wire as thin as you want and still pass the same amount of current through it, without melting the wire. Picture using a USB-C cable to charge your car. † (There'd still be a current limit due to the heat generated by the chemical reaction that rebuilds the battery's voltage potential... if said reaction is exothermic. Some battery chemistries are endothermic when charging!)
- postmodest 3y agoWouldn't the battery itself still have resistance? Or is the superconducting material itself a battery?
- derefr 3y agoDepends. A single battery cell would have nontrivial resistance, yes. But a big bank of batteries, like are in an EV? Very hard to give them enough current to heat them up. Most of the "heat problem" is from the bottlenecked current path into the car; once you fan out across all the individual cells, each individual cell isn't receiving much current. And a bank of supercapacitors? You could charge it effectively instantly.
- xwdv 3y agoWhat’s the next big tech in the tech tree after room temp superconductors?
- trailingComma 3y agoCold fusion, after containment with superconductors becomes easy.
- feoren 3y agoApplied Relativity (Discover 5), then Photon/Wave Mechanics (Conquer 6), Probability Mechanics (Build 7), and Nanometallurgy (Explore 8). Once we also discover Organic Superlubricant (Conquer 7), we'll get to Matter Compression (Conquer 9). Organic superlube!? Oh, it's great stuff! Great stuff.
- hn_throwaway_99 3y agoSomeone posted this in a comment on another post of LK-99: Wouldn't the first step be verification before replication? I.e. have the original authors send out some LK-99 samples to other researchers to at least confirm "Yes, this thing is a high temperature superconductor". Wouldn't matter even that much if it were made with unicorn dust: it would be proof that high temperature superconductors are even possible, which is itself a huge, huge deal. After that replication of production of LK-99 would of course be critical, but just proving it exists should alone be enough for grand celebration.
- xtracto 3y agoThis LK99 thing all sounds to me very similar to the Podkletnov Gravity Shielding experiments of the 1990s . There may be something, but the mainstreet media is blowing it out of proportions. Some scientists may get hurt for this.
- postalrat 3y agoI haven't seen much of anything on the mainstream media. Just here in hn and other tech sites. Are you making this up?
- TillE 3y agoBecause unless all current replication attempts fail, it would be totally pointless. I know we're all eager for news, but there's no urgent need to verify the claims. That's not how science works. Give it a couple weeks.
- deleted 3y ago[deleted]
- Exuma 3y agoHas that German scientist that answered like an asshole ever posted a reply yet? I want to see what some of the aggressive nay-sayers are saying now. I love this bit of schadenfreude.
- djha-skin 3y agoHug of death https://drive.google.com/uc?id=1sARgr7qWQdkRKfToEZJIm-1XVsbqx7mf&filename=2023-08-01-15-15-15.png https://drive.google.com/uc?id=1sARgr7qWQdkRKfToEZJIm-1XVsbq...
- JINYIN 3y agoawsome，man，这是我丁真的独享时刻
- tnecniv 3y agoI posted this elsewhere but I think it was after comments got merged in here, so sorry for the spam if you happen to see it twice: I’m interested to know if anyone has any recommended resources on DFT or DDFT (the simulation method used here) for someone with good applied math knowledge but who is not a physicist. I have a decent working knowledge of stat mech from knowing about dynamical systems and information theory, but I am not a physicist. I’ve come across (classical) DFT before, but the tutorial papers I’ve come across get weighed down by a lot of physics jargon and notation that I don’t understand and they describe it in terms of certain physical systems that obfuscate whether I can adapt the method to problems I am interested (I think the answer is yes in my case but if I was confident I wouldn’t be asking). I could just rederive (classical) D or DDFT for my stochastic process, and that is likely the best way to learn it, but having a resource that is written more from the perspective of dynamical systems than a physicist would speed the process up quite a bit!
- royibernthal 3y agoFascinating stuff :)
- danielrangel 3y agoAre we superconducting yet?
- keepamovin 3y agoApart from levitation and resistance, free conductivity, what are superconductors really good for? Like how could an iPhone become better with super conductive room temperature materials?
- 576576gdgdgfd 3y agoWhat's next is amazing. You wouldn't had believed it if I had told you a month ago.
- King-Aaron 3y agoAre these guys just trolling? They reference Dr Salvatore Cezar Pais in the patent. The spaceship guy. Surely they're trying to stir the pot with that. https://patents.google.com/patent/WO2023027537A1/en https://patents.google.com/patent/WO2023027537A1/en
- eps 3y ago"Cited by examiner"
- mikhailfranco 3y agoIs this material structure improbable enough that it raises the question of reverse engineered UAP debris :)
- perlgeek 3y agoNo
- JaggerJo 3y agoWhat fields would directly benefit from this? Would buying quantum computing stocks be a good idea now?
- anshumankmr 3y agoDamn,literally blasting the Oppenheimer soundtrack at full volume while reading this... Exciting time to be alive. Hope the hype is worth it..
- acat 3y agohttps://www.surveymonkey.com/r/2SR8DFQ https://www.surveymonkey.com/r/2SR8DFQ