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Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

arxiv.org

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Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#81

Post by karmasimida »

throwaway69123 wrote: post #71
MagicMoonlight wrote: post #42

Earlier quoted context omitted.

Anything that uses electricity would use less electricity because you aren’t wasting it as heat. So in theory you could have a ridiculous computer that runs 1000GW of power through it without heating up. Or a flying car. Or power cables that lose nothing during travel. Naturally that’s why it doesn’t make sense. It’s too game-breaking to be possible in normal conditions. Glitching something out by making it basically…

It makes about as much sense than a computer in your pocket that’s not even plugged in being many orders of magnitude better than a computer that takes up an entire room and can barely do on operation a second

Battery is just one thing that stands in the way to make our phone more powerful, even totally remove the battery, it still takes up quite some space.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#82

Post by klabb3 »

tdehnel wrote: post #63
huijzer wrote: post #28

Earlier quoted context omitted.

> 1) it takes a undergrad to make and measure a superconductor by a Nobel laureate to explain it. Another example of Taleb’s idea that experimentation comes first and theories second. Universities pretend that it’s the other way around but apart from an Einstein it’s usually not.

Not possible. Theory comes first. Scientists need a theory first to know which experiments to do. Any interesting experimental results are interesting precisely because they do not conform to the existing theories. Edit: here's a decent writeup to show what I mean https://en.wikipedia.org/wiki/Theory-ladenness

> Not possible. Theory comes first.

I used to think this way but it’s significantly more liberating and true to see theory as plausible explanations. Theories are very often afterthoughts, where the utility is prediction of new events, or narrowing the search space of experiments. A theory explaining past events only is not really a theory at all. But you can narrow search space in many ways without elaborate theories. For instance, you may assume that since birds can fly, if we make a machine that looks similar, we might be able to fly as well. Terribly simplistic theory, but nevertheless a good starting point.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#83

Post by picadores »

jjallen wrote: post #34
causalmodels wrote: post #18

Earlier quoted context omitted.

Hoverboards.

Is this actually true? It is not obvious to someone somewhat versed in physics how this is enabled by room temperature super conductors unless the entire riding surface is magnetized.

All of earths surface is electro-statically charged. So you can electro-static repulse yourself from it..

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#84

Post by gmadsen »

huijzer wrote: post #28
sonium wrote: post #20

I have a PhD in material science and worked with superconductors, here are two things that is often misunderstood: 1) it takes a undergrad to make and measure a superconductor but a Nobel laureate to explain it. 2) in theory if you understand the mechanism of something you can improve it. In material science however almost always all you need is a trial and error approach to end up with a good result. Conclusion: the…

> 1) it takes a undergrad to make and measure a superconductor by a Nobel laureate to explain it. Another example of Taleb’s idea that experimentation comes first and theories second. Universities pretend that it’s the other way around but apart from an Einstein it’s usually not.

not really?, Dirac, Von Neumann, etc. taking a look at the history of the nobel prize, its typically the case that something is predicted by theory, then once an experiment is able to verify, then prizes are given out.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#85

Post by BlueTemplar »

huijzer wrote: post #28
sonium wrote: post #20

I have a PhD in material science and worked with superconductors, here are two things that is often misunderstood: 1) it takes a undergrad to make and measure a superconductor but a Nobel laureate to explain it. 2) in theory if you understand the mechanism of something you can improve it. In material science however almost always all you need is a trial and error approach to end up with a good result. Conclusion: the…

> 1) it takes a undergrad to make and measure a superconductor by a Nobel laureate to explain it. Another example of Taleb’s idea that experimentation comes first and theories second. Universities pretend that it’s the other way around but apart from an Einstein it’s usually not.

What universities ? They don't have labs ?

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#87

Post by jiggawatts »

est wrote: post #23

https://www.bilibili.com/video/BV14p4y1V7kS/ Latest update: the diamagnetism has been confirmed from a tiny LK-99 replica sample. The Author posted: > Under the guidance of Professor Haixin Chang, postdoctor Hao Wu and PhD student Li Yang from the School of Materials Science and Technology of Huazhong University of Science and Technology successfully for the first time verified the LK-99 crystal that can be magnetica…

Doesn't anyone working in the physical sciences know how to record a decent video that isn't shaky, blurry, out-of-focus, or a handheld mobile phone recording of a computer screen?

He's using a digital microsocope! Just press the "record" button and upload that!

I can't wait for someone to successfully reproduce it, use a polaroid camera to take the photo, print it out, fax it, and have someone scan in the photocopy, take a photo of the scan from their screen, and upload it to a social media website that'll recompress it and put a watermark on it. Nobel prize winning stuff, right there.

https://imgs.xkcd.com/comics/digital_data_2x.png

PS: No, the sample does NOT "levitate". From what little I could see form the shaky and blurry video, it just moves around, like any magnetic substance would. It could be a piece of rusty iron that flaked off something else, for all we know.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#88

Post by evouga »

sigmoid10 wrote: post #69
ajb117 wrote: post #55

I don't know much physics, but is there a reason we should be hoping for superconductivity specifically rather than a cheap material that's just a very very good conductor? Also, even if LK-99 were superconductive, that wouldn't imply it would be useful for computing, right? Surely there are materials that are better conductors than silicon but have mechanical and other physical quirks preventing us from using then f…

Silicon is not valuable because it is a good conductor, in fact it is actually more like an insulator in its natural state. However, mixing the right materials into it, it becomes a very good semiconductor . So it can let current flow easily or block it effectively, making it a good basis for transistors. The problem here are the normal (usually copper) wires between transistors that cause heat to build up whenever c…

How much of the cooling cost of current chips is due to wires, vs. the transistors themselves?

Superconductors will not help with the latter.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#89

Post by russdill »

sanxiyn wrote: post #35
brunooliv wrote: post #12

What are the implications in general of room temperature superconductors? I just know that they needed typically ultra low temperatures right? But what would be the practical implications?

Cooler chips. Chips heat due to resistance, and superconductors have zero resistance (by definition). I suspect this is the company's intended application. The following quote from their patent is very suggestive if you know about semiconductor manufacturing. > In addition, various energy sources used for deposition are not limited to chemical vapor deposition (CVD) using heat, but atomic layer deposition (ALD), sput…

Superconductors don't make dynamic power somehow go to zero, switching from one state to another still means draining the capacitance.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#90

Post by jiggawatts »

verytrivial wrote: post #38
sonium wrote: post #20

I have a PhD in material science and worked with superconductors, here are two things that is often misunderstood: 1) it takes a undergrad to make and measure a superconductor but a Nobel laureate to explain it. 2) in theory if you understand the mechanism of something you can improve it. In material science however almost always all you need is a trial and error approach to end up with a good result. Conclusion: the…

If we assume it isn't superconductivity, is the amount of diamagnetism still novel/interesting if not a world changing?

Only if it's significantly more than pyrolytic graphite, which appears to be the record-holder at the moment. It would have to be sufficiently strongly diamagnetic to levitate over ordinary magnets, which could have interesting applications. Think low-friction and low-vibration bearings, etc...
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