16 ms·
Unconfirmed video showing potential LK-99 sample exhibiting the Meissner effect
- dtx1 3y agoCan anyone with better twitter experience figure out who posted this first?
- mrandish 3y agohttps://news.ycombinator.com/item?id=36963751 https://news.ycombinator.com/item?id=36963751
- jychang 3y agoThis is the source: https://twitter.com/vasuttomas0423/status/1686423440214118400?s=46&t=Tz0PvUSd0jpV-jtTSoNFZg https://twitter.com/vasuttomas0423/status/168642344021411840... @dang might be a good idea to replace the link
- zardo 3y agoAuto-translated > This is the first time I've been joining Twitter to this question. Looking for the source of this video. My fellow researcher said he received this video from another colleague on Telegram. So the "source" is someone asking if anyone knows the source. This video could easily be a hoax.
- eiiot 3y agoThe original source of the video (from a telegram channel?) has the rock floating horizontally, which would make an actual superconductor much more plausible. https://twitter.com/vasuttomas0423/status/1686423440214118400?s=46 https://twitter.com/vasuttomas0423/status/168642344021411840...
- dtx1 3y agoCould be a horizontal video that was rotated
- heyitsguay 3y agoIt is, the same author posted a rotated version in the replies: https://nitter.net/667keos/status/1686490898480173056#m https://nitter.net/667keos/status/1686490898480173056#m
- red_trumpet 3y agoThat's not the same author, is it?
- drooby 3y agoI’m extremely confused why people claiming to make (or corroborate) a massive scientific discovery are using potatoes to film their evidence.
- pengaru 3y agoWelcome to the future where convenience is king, regardless of context.
- Dalewyn 3y agoYou fight wars with the army you have, not the army you want. In this day and age, practically everyone has a potato in their pocket. Almost noone has a professional video camera with requisite lens assembly costing at least several grand total in their pocket (not that one would fit in there).
- voisin 3y agoWould the iPhone 15 with Macro lens work?
- josephg 3y agoThe iPhone 15 doesn’t launch until September.
- voisin 3y agoSorry, 14
- worthless-trash 3y agoFound the time traveller.
- vardump 3y agoDamnit. They said iPhone 15 is period correct!
- zeronullempty 3y agoI think this is basically "leaking" things that are intended to be published later in papers and journals.
- koalala 3y agothe original poster said that this video was sent to him by a fellow researcher who received it on telegram from 'a colleague'. no further details given. if this is truly lk99 showing flux pinning, then that would be very strong evidence that it's also a superconductor. (physics bsc here, my only experience with condensed matter is 1 course and nothing more)
- dTal 3y agoYou can observe the Meissner effect using an ordinary pencil lead, so I wouldn't call it "very strong evidence": https://www.youtube.com/watch?v=yeIizmhzPQc https://www.youtube.com/watch?v=yeIizmhzPQc
- dtx1 3y agoNo, thats just diamagnetism not the meissner effect
- alchemist1e9 3y agoIs there anything in these videos that is unique to meissner effect? in others words why can’t it be diamagnetism?
- dtx1 3y agoIt looks (could be faked) like flux pinning is happening. Essentially, it's not moving but staying in place. Imagine trying to balance a magnet on another. It would not inherently stay in place.
- mitthrowaway2 3y agoIt looks like that permanent magnet it's hovering over is a simple dipole magnet, rather than an array. A diamagnet would be unstable in that position. Look at any video of floating graphite and you'll see it hovering on top of a 2x2 array of magnets. Of course, you could fake it for a video by buying a special disc magnet with a multipolar magnetization pattern, but magnets like that are pretty hard to find.
- chayesfss 3y ago[dead]
- swader999 3y agoWas I the only one that tried to clean my screen to get the piece of dirt off it?
- xorbax 3y agoAnd now you know why, even if real, we won't build power lines from Alaska to New York with it
- XorNot 3y agoWhat is with the large number of commentators who have a bizarre "static world" hypothesis of technology? Like, roll back to 90s and tell me that Lithium-Ion batteries would be powering all my power tools today and be on-par or better then corded counterparts?
- King-Aaron 3y agoPeople think it's cool to be dismissive.
- xorbax 3y agoIt's more in fashion to hype things beyond their capabilities and ignore important details you're not fluent in
- xorbax 3y agoThe 90s? It depends on where you worked and what you read. Li-ion wasn't exactly a bolt from the blue. Material properties are an issue to consider. If they've been working for 25 years "knowing" this product is there, I'd be a little conservative about how much of the sky I'd let my pie consume. Even if synthesis is perfected, it's a ceramic. It may end up being a superconductor along only one axis. That's not a recipe for ductile feedstock.
- spaceman_2020 3y agoEvery new tech gets bashed on HN, to the point where you'd think you're on AmishNews instead of HackerNews. There's a bizarre lack of ability to project into the future - if a piece of tech isn't 100% perfect right at launch, it's apparently useless. Seen that for everything from 3D printing and AI to fusion and superconductors.
- 38 3y agonon crappy link: http://farside.link/twitter.com/zebulgar/status/1686498517227814912 http://farside.link/twitter.com/zebulgar/status/168649851722...
- jiggawatts 3y agoThe key thing to notice in this video is that the spec is levitating above a single monolithic magnet. The levitation with ordinary diamagnets such as pyrolytic carbon requires an array of magnets to create a concave pocket in the field, otherwise the floating sample will "slide off" and fall. Monolithic magnets produce convex fields. Some people elsewhere also commented that this could be a video of an ordinary high-temperature superconductor, but I doubt it. Such a tiny spec would warm up to room temperature very quickly. I've experimented with broken and shattered fragments of YBCO and it wasn't possible to make small pieces hover like this, they'd warm up too quickly. Also, they were always frosty looking. To make them look black you'd have to do it in a perfectly dry atmosphere, which is a non-trivial setup.
- ghayes 3y agoI had to look up "high-temperature superconductor" since it read like a typo: > High-temperature superconductors (abbreviated high-Tc or HTS) are defined as materials that behave as superconductors at temperatures above 77 K (−196.2 °C; −321.1 °F), the boiling point of liquid nitrogen. They are only "high-temperature" relative to previously known superconductors, which function at even colder temperatures, close to absolute zero. https://en.wikipedia.org/wiki/High-temperature_superconductivity https://en.wikipedia.org/wiki/High-temperature_superconducti...
- px43 3y agoLooks like we're going to need a VHTS and UHTS. Exciting times.
- mensetmanusman 3y agoUltra mega high definition superbconductor
- throwawaymaths 3y agoWe have RTS
- Nition 3y ago
- est 3y agoIn case anyone missed previous videos 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. Another by Qufu Normal University https://www.zhihu.com/zvideo/1669820225079070720 https://www.zhihu.com/zvideo/1669820225079070720
- soultrees 3y agoCurious, what does the text flying by on the screen say on the bilibili video? I’m always amazing at the cultural differences in design and how Chinese apps tend to always be so busy. Everything feels like a slot machine.
- eschatology 3y agoThey are user comments: https://en.wikipedia.org/wiki/Danmaku_subtitling https://en.wikipedia.org/wiki/Danmaku_subtitling Compared to regular comments on say youtube, these kinda give a time element to the comments, when they should appear in the video playback
- schroeding 3y agoYoutube annotations (those coloured speech-bubbles that did not work on mobile) were (mis)used in a similar way - some uploaders opened them for everybody, allowing all users to leave a "comment" in form of an annotation at a certain point in the video.
- chen0x00 3y agoThat thing is called "弹幕DanMu" (Barrage), which is a type of synchronized comment that appears alongside video playback. In this video, most of the comments are related to "taking a group photo" and "sending blessings". Perhaps because Chinese characters can convey more information in shorter sentences, this form of commentary is not as popular in other places, but it can actually be quite interesting. It provides an interactive experience that transcends time and space. On Bilibili, you can adjust the display area, font size, transparency, scroll speed, and intelligent prevention of blocking the main content for danmu. If you don't like it, you can turn it off.
- Escapado 3y agoThis whole saga is so exciting to watch. Maybe someone with a background in material science and/or engineering can help me out with a question: _If_ LK-99 turns out to be a room temperature superconductor how likely do you think it will be that we figure out how to to mass produce it in sufficient quality and quantity so that it can in fact be used for all the exciting applications we have for rtscs? I mean it's one thing to create a lab sample at 10% yield the size of a thumbnail but another thing entirely to create super long cables or massive amounts of motor parts or large sheets of it for MRTs. Is it a matter of time? Or could some applications remain elusive because of other potentially undesirable properties of the material (brittleness, heterogeneity, you name it)?
- tired_and_awake 3y agoIf its real, it's going to excite a metric fuckton of funding in hightc superconductors research. It doesn't have to be LK99. It'll be one of the other variants that we discover. Others with more knowledge materials production please add more to this... but it's certainly encouraging there's no rare earth metals or anything radioactive as a component! https://upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Timeline_of_Superconductivity_from_1900_to_2015.svg/1280px-Timeline_of_Superconductivity_from_1900_to_2015.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Ti...
- amluto 3y agoI would much rather have rare earth metals involved than lead. (Rare earths are neither particularly rare nor particularly toxic. They do seem to have the annoying property that there aren’t that many large rare earth mines.)
- psKama 3y agoRather than this particular "magic" material, LK99, in the original paper(s), authors propose their theory on why this material is behaving the way it is. This is a totally new way for achieving superconductivity in room conditions. If it is confirmed to be true, scientist can try to create similar materials with similar lattice structures focusing on what's needed, rather than focusing on LK99. Even if LK99 may not, one of the materials with similar properties they will create may be easy to produce and robust to use.
- alkibiades 3y agoso how expensive would this material be to make? i’ve seen everyone say potential uses but i just wanna know if it’s economically feasible
- coolspot 3y agoLike $20 per kilo + energy and labor
- Snoozus 3y agoFor context, copper is around 7 per kilo.
- aqme28 3y agoThe bulk cost of this material is not going to be the problem with commercialization. The ingredients and labor aren't very expensive. The problem is that no one has found a process to consistently make chunks bigger than like a rice grain of this stuff.
- DoingIsLearning 3y agoIf you can grow it in a constrainted geometry a grain of rice is a very large footprint for IC design. The real revolution with something like this is in IC design (computers & Sensors) and maybe Transformer/Inductor/Coil design. Nobody is realistically expecting to roll out hoverboards or HVDC cables with this crystal.
- KeplerBoy 3y agoWouldn't we need it to be a semiconductor to be useful for ICs? Also what kind of ICs are we talking here? The handful of nanometer cutting edge stuff for compute or power ICs for charging circuits and similar stuff?
- _aavaa_ 3y agoI think they're talking about using it for all of the connections between the gates.
- tanepiper 3y agoAbout the same quality as most UFO videos.
- WithinReason 3y agoI want to believe
- anthony88 3y agoAs a non physicist here, why not showing a video of a ohmmeter showing zero's when measuring the resistance of this material instead of its levitation?
- Kenji 3y ago[dead]
- Out_of_Characte 3y agoLook at how tiny the spec is. What would be the most convincing evidence? A resistence meter that basacally touches itself or a spec clearly floating on a magnet without cooling.
- netheril96 3y agoMy guess is that it needs to be very pure to have zero resistance. But levitation requires less purity.
- out_of_protocol 3y agoWay too easy to fake. Too many places to modify, including non-obvious like ohmmeter mode or firmware
- segfaultbuserr 3y agoA Meissner effect demo is usually seen as an easier and stronger proof of superconductivity than a resistance measurement, which is a delicate task and susceptible to experimental errors. First, one cannot measure superconductivity with an ordinary ohmmeter. Electrodes, wires and the ohmmeter itself are resistive, the meter can never show zero ohms. So you can't just look at the screen read-out and say there's superconductivity, you need to set an experiment up to do it manually, with a current source and a voltmeter to measure the IV curve across the material [1]. Even then, the voltmeter will never show "zero" volt because of noise, such as thermocouple effect, triboelectric effect, or electromagnetic interference - which need to be minimized during the experiment and removed during post-processing. There are also the problems of sample preparation and purity as others have noted. [1] It's basically the same 4-wire Kelvin sensing used by all milli-ohmmeters. But to characterize superconductivity, you need to do even better. https://en.wikipedia.org/wiki/Four-terminal_sensing https://en.wikipedia.org/wiki/Four-terminal_sensing
- JaggerJo 3y agoI wonder if there is a way to make a profit by buying quantum computing stocks right now..
- RyanAdamas 3y agoGonna need a banana for scale, boys. Edit: Is it possible to replicate the structure of this material using carbon nano-tubing? Someone mentioned packing ceramic like materials into silver tubes as a means of making cables; can that be done with carbon nano-tubing?
- stephenitis 3y agoI believe it was tried, carbon nanotubes don't work. I can't cite the reason why.
- meindnoch 3y agoBullshit. I believe it when prediction markets say so.
- tb_technical 3y agoWhat's stopping us from using superconductors to link power grids together? Does this technology enable more solar energy use without overloading the disconnected power grids?
- wffurr 3y agoSame thing that stops us from building long distance HVDC lines with off the shelf tech: money and time.
- tb_technical 3y agoThank you
- sixQuarks 3y agoWhy is everything surrounding this discovery seem so amateur? From the initial paper being so flimsy to all the "leaked" videos looking like it was taken by a monkey trying to learn how to video tape for the first time. Like, is it that difficult to try to get a decent video of something that is life changing?
- regularfry 3y agoYes. The intersection of people who have been lucky enough to make a working sample and people who have decent video equipment has no reason to be other than an empty set.
- sixQuarks 3y agoEverybody has a smartphone these days. I’m not asking for a professional production.
- VerminOctopus1 3y agoYeah it’s hard for me to take any of this at face value given how absolutely janky the evidence is thus far. I’m waiting for some non-potato cam footage with a human saying “hey watch this superconductor footage, this is what we did to make the material”
- sigmar 3y agoI've got to imagine this is fake (not LK-99, but this video specifically) because there's already other partial levitation videos out, and anyone that synthesized this material well enough to get full meissner effect levitation would post about it with their name (or lab name) attached ASAP. edit: also the origin story sounds strange, unless translated badly "A fellow researcher of mine said he received this video from another colleague on Telegram."
- q3k 3y ago> would post about it with their name (or lab name) attached ASAP You underestimate how many people simply don't feel the need (or explicitly don't want) to have their name attached to their work.
- marcusverus 3y agoSuch people are commonplace when the stakes are low, but when the stakes are high, they are few. How many world-historical contributions can you think of which were made by people who intentionally remained anonymous? Satoshi is the only one who comes to mind.
- Spare_account 3y agoOne possible view on this topic is that you're experiencing a form of confirmation bias here. You aren't aware of the numerous people who have stayed under the radar in the process of every stage of development that has ever happened.
- IG_Semmelweiss 3y agoSatoshi Nakamoto for sure