Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O • Hacker News Board

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#161

Post by whimsicalism » Thu, Aug 03, 2023, 5:05 AM UTC

jseip wrote: post #157

marcosdumay wrote: post #96

Earlier quoted context omitted.

It's not that extraordinary. When people rush to replicate an experiment, everybody with a positive result has something to publish very quickly, and everybody with a negative result need a lot more time to be certain of it. The kinds of results we are seeing are very hard to get by chance or due to bad experimental setup. But as a rule, we can't really differentiate a real thing from random noise in as little time a…

"It's not that extraordinary." How is that possibly true? LK-99 is already amongst the highest-temperature superconductors ever found (with that claim substantiated by at least two independent research teams as of this moment).

I don't know if you work in this field, but you are putting way too much faith in what has been reported so far

People are way, way overconfident. Most people in the field would not be willing to put it at >50% odds at this point.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#162

Post by anonuser123456 » Thu, Aug 03, 2023, 5:07 AM UTC

blueprint wrote: post #128

jcranmer wrote: post #74

Earlier quoted context omitted.

> Worst case scenario, we got another class of high temp (warmer than liquid nitrogen but cold enough that applications are limited) superconductor but nothing revolutionary since at this point, it is pretty conclusive that there is something interesting with LK-99. I don't think that's the worst case scenario. The worst case scenario is that there is actually nothing interesting with LK-99, and everything we've seen…

> The worst case scenario is that there is actually nothing interesting with LK-99, and everything we've seen that suggests otherwise is experimenter bias heaped on top of experimental error. well while we're one-upping each other I'm pretty sure the worst case scenario is some lk99 synthesizer actually creates a black hole which gobbles up the planet.

An lk99 synthesizer creating a false vacuum decay would be worse.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#163

Post by qingcharles » Thu, Aug 03, 2023, 5:07 AM UTC

cooper_ganglia wrote: post #120

sedatk wrote: post #99

Earlier quoted context omitted.

Wow, I would've never thought to use ChatGPT for this. Very cool.

I use ChatGPT as a word calculator for literally everything all of the time. It’s super great for achieving proper formatting easily!

Indeed. I always tell it to use proper fancy quotes and proper apostrophes in its output, but I can't get it to do it 100% of the time despite trying out many prompt variations and telling it the Unicode values etc etc.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#164

Post by blharr » Thu, Aug 03, 2023, 5:17 AM UTC

jjallen wrote: post #148

jcranmer wrote: post #74

Earlier quoted context omitted.

> Worst case scenario, we got another class of high temp (warmer than liquid nitrogen but cold enough that applications are limited) superconductor but nothing revolutionary since at this point, it is pretty conclusive that there is something interesting with LK-99. I don't think that's the worst case scenario. The worst case scenario is that there is actually nothing interesting with LK-99, and everything we've seen…

The reason I don't think this is the case is that they have literally been working on this thing for a quarter of a century. While the people involved are not full on superconductor experts, they are also not super stupid and realize that their claim is a huge one. How could you work on something for years and years and years, make a claim that it is the first room temperature SC and be _totally_ wrong about it. Even…

Being wrong in such a complicated field is always possible. Your personal experience and expertise can only go so far.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#165

Post by unsupp0rted » Thu, Aug 03, 2023, 5:25 AM UTC

declan_roberts wrote: post #139

progrus wrote: post #124

It’s real, it works, the Navy has a linked patent from 2017. The UFOs are a PSYOP.

The Navy does have a patent for a “lead zirconate titanate” super conductor which does sound awfully similar to what’s described in LK-99. https://phys.org/news/2019-02-navy-patent-room-temperature-s...

> The application claims that a room-temperature superconductor can be built using a wire with an insulator core and an aluminum PZT (lead zirconate titanate) coating deposited by vacuum evaporation with a thickness of the London penetration depth and polarized after deposition.

> An electromagnetic coil is circumferentially positioned around the coating such that when the coil is activated with a pulsed current, a non-linear vibration is induced, enabling room temperature superconductivity.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#166

Post by xvector » Thu, Aug 03, 2023, 5:30 AM UTC

kuprel wrote: post #145

tomohelix wrote: post #30

Summary of events so far: The claim: Room temp (~300K) superconductor exists and we got it! The replication attempts: The production method is so poorly documented only a fraction of the samples being made shows any interesting properties. And among those interesting ones, results varies. Very few, if any, attempt actually completely shows the entire spectrum of properties and behaviors of a true superconductor at ro…

Why don't they just share the original sample? At least it could offer an existence proof

The probability of being able to reproduce this is unknown, there's no reason it couldn't be one in millions.

If the original sample breaks in transit or experimentation we may have lost the only example of a room temp superconductor ever seen.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#167

Post by rrssh » Thu, Aug 03, 2023, 5:33 AM UTC

FrustratedMonky wrote: post #154

Analemma_ wrote: post #125

Earlier quoted context omitted.

I understand why a lot of people think this, but I don't think we can say that with confidence yet. Cold fusion "replicated successfully" multiple times in the 80s too.

Wasn't the problem with Cold Fusion that it did NOT replicate, and thus got sullied with a bad reputation, so nobody wanted to touch it. Then decades later, it's still kind of open question. Aren't there some studies still going on, more on the down-low since it has such a bad reputation. Kind of like the super-conductor, have to keep it quiet and make really sure before publishing. Sabine did video on Cold Fusion th…

There were positive and negative results, just like in this case.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#168

Post by monocasa » Thu, Aug 03, 2023, 5:35 AM UTC

frognumber wrote: post #126

brucethemoose2 wrote: post #33

Earlier quoted context omitted.

Some literature suggests its a "one dimensiononal" superconductor only kinda works in tiny monocrystaline grains. ...But maybe thats even more interesting for, say, microelectronics? Especially if the resistance orthogonal to the superconductivity is high, if such a thing is even possible?

Such things are possible, and not even very uncommon. The human body has tissues with conductivity different in different dimensions. If you'd like to create one yourself, take a bunch of parallel insulated wires. Conductivity will be low along the wires, and high perpendicular to them. Or alternated high-resistivity and low-resistivity sheets. Conduction will be low parallel to the sheets, and high going through the…

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#169

Post by alex_suzuki » Thu, Aug 03, 2023, 5:39 AM UTC

yongjik wrote: post #68

Waterluvian wrote: post #45

I don’t understand the physics, but it feels like a truly zero resistance conductor would violate some law of thermodynamics or something. Is a superconductor truly zero impedence or just very very very low? Because I’m seeing a lot of these graphs with something like: “0.00001ohm” as the y-axis floor.

Not an answer, but if you think superconductor is weird, look up superfluid, now that's going to make your head spin.

Superfluids have been around for ages - we call them beers.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#170

Post by ssamt » Thu, Aug 03, 2023, 5:51 AM UTC

ibic wrote: post #86

brucethemoose2 wrote: post #33

Earlier quoted context omitted.

Some literature suggests its a "one dimensiononal" superconductor only kinda works in tiny monocrystaline grains. ...But maybe thats even more interesting for, say, microelectronics? Especially if the resistance orthogonal to the superconductivity is high, if such a thing is even possible?

I think you are referring to the pioneer work done by Prof. Chair Tong-seek (or Dongsik Choi as another spelling) here? https://twitter.com/sanxiyn/status/1684437744406392833 Any Korean can give some brief summary over the book that tweets mentioned?

There is a short introduction right on the link.

"The author writes on the influence and meaning of the certain future superconductor revolution on humanity, and while showing similar guise as Western science, he attempts to maintain the notion of the Oriental spirit, the confidence and self-esteem of East Asian scientist." Something like that. I'm not sure what it means.

(Also, yes, Choi Dongsik is probably correct.)