4 ms·
This is basically proof of room temperature superconductivity correct? (Of course assuming it isn't a hoax)
by shawabawa3 3y ago
This is basically proof of room temperature superconductivity correct? (Of course assuming it isn't a hoax)
- dmitrybrant 3y agoAssuming everything in the video is real, the only remaining question is: what is the actual temperature of that sample? If all of this checks out, then it's a new era.
- jiggawatts 3y agoSuch tiny samples warm up to room temperature very quickly, on the order of a few seconds. In my experience, it's not possible to make such small pieces of YBCO superconductor levitate, they warm up too fast.
- topynate 3y agoNo frost on the sample either. The only way I can think of to fake this in camera is to make the "sample" out of a strong magnet, and make the "magnet" a hollow shell concealing a chilled piece of YBCO!
- incrudible 3y agoYou would be surprised what can be achieved with bit of nylon string and an appropriate camera setup. If this is a most groundbreaking discovery, why waste all that screen resolution on the backdrop?
- wesleychen 3y agoI think because the minimum focus distance for most phone cameras is around 8 inches so they have to film kind of far away or else it will go blurry.
- anonymousiam 3y agoI believe the backdrop is there to show ambient conditions.
- Enginerrrd 3y agoIt looks convincing to my naive eyes, but how would you differentiate between this and diamagnetic levitation of something like pyrolitic graphite?
- cthalupa 3y agohttps://twitter.com/Andercot/status/1687748594563268608 https://twitter.com/Andercot/status/1687748594563268608 seems to indicate that simply diamagnetic levitation cannot create the level of stability shown in this video.
- Enginerrrd 3y agoI don't think that's right. Diamagnetic levitation is one of the ways you can get around Earshaw's theorem. Funny enough this is a quote taken directly from the wikipedia article that Andercot linked, in the "loopholes" section: >Earnshaw's theorem has no exceptions for non-moving permanent ferromagnets. However, Earnshaw's theorem does not necessarily apply to moving ferromagnets,[4] certain electromagnetic systems, pseudo-levitation and diamagnetic materials. These can thus seem to be exceptions, though in fact they exploit the constraints of the theorem. ... >Diamagnetic materials are excepted because they exhibit only repulsion against the magnetic field, whereas the theorem requires materials that have both repulsion and attraction. An example of this is the famous levitating frog (see Diamagnetism).
- cthalupa 3y agoSure enough. Which, well, makes sense, since superconductors are "perfect" diamagnets, so them being able to do it seems to necessitate that the greater class of diamagnets on the whole can too. The only examples I can find of stable non-superconductor diamagnets involved 4+ magnet arrays, though, or multipole magnets, e.g. https://phys.org/news/2014-08-diamagnetic-levitation-pyrolitic-graphite-magnet.html https://phys.org/news/2014-08-diamagnetic-levitation-pyrolit... and not dipole configurations like this video seems to show.
- sudosysgen 3y ago
- Arn_Thor 3y agoNo, the video contains no information about its conductivity.
- Arn_Thor 3y agoVindication https://arxiv.org/abs/2308.03110 https://arxiv.org/abs/2308.03110
- pera 3y agoThis is an hoax and it's sad to see people like Sabine Hossenfelder falling for it so easily: - video recorder in a kitchen or living room - created by some random tiktok account - no credentials, no description - tagged "mysterious" It's hard to understand how anyone would believe this, specially after so many other fakes
- fallingknife 3y agoI see no indication that it was filmed in a kitchen or living room.
- fnordpiglet 3y agoIn fact I see some serious lab quality glassware in the background. But posting without its provenance is a weird for sure. IMO there’s an awful lot of amateur / informal attempts that are promising enough that, while not convincing, are inspiring of hope. But I do wonder how much is fake. But more than a few seem to be clearly not fake, such as the work Varda is posting.
- p-o 3y agoHoax is quite a strong word where there's been quite a few replication attempts with various degrees of success. Like others have said, we're not sure what this is, but it almost certainly isn't a hoax. As for this video, well, it's like all the other ones that came before it, we'll know more once we have more data/videos/replication attempts.
- mr_mitm 3y agoSome of the other videos were at least from some more or less reputable sources. This one appears to be anonymous, or am I wrong?
- Hakkin 3y agoThe source[0] seems to be the Douyin (TikTok) user 炼丹师阿翔[1], who also posted a different LK-99 demonstration video[2] a few days ago that shows similar results to previous demonstrations by other researchers. [0] https://www.douyin.com/video/7263715495256378659 https://www.douyin.com/video/7263715495256378659 [1] https://www.douyin.com/user/MS4wLjABAAAAJaTuSBArw0c6bK0eI9T1-f_SBoqNbWhBpyF87zp5-iBddzzmt6_GSTHBMoDmolba https://www.douyin.com/user/MS4wLjABAAAAJaTuSBArw0c6bK0eI9T1... [2] https://www.douyin.com/video/7262676385154583860 https://www.douyin.com/video/7262676385154583860
- kzrdude 3y agoLet's use the word evidence and not proof for each part of the puzzle
- oxfordmale 3y agoNo, it is not yet proof of superconductivity. It also requires measurements of the electric resistance as function of the temperature. For now LK-99 is an material that displays some of the superconducting properties at room temperature.
- blablabla123 3y agoI mean based on current understanding a previous video that showed levitation independent of the orientation was already sufficient to show it's not diamagnetic but superconducting. Assuming this is not a hoax actually the very first video together with the paper already shows everything. (Levitation, mentioning of zero resistivity regions) Although generally the accepted method is that other labs reproduce it and that the paper passes peer review. Some videos aren't enough.