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Electronic Structure of LK-99

arxiv.org

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Re: Electronic Structure of LK-99

#171

Post by klysm »

SamPatt wrote: post #47
jeffbee wrote: post #16

The most interesting phenomenon revealed so far is that the room-temperature superconductor people and the generative-LLMs-are-God people draw on the same limited global pool of credulity, such that HN cannot be flooded with both ChatGPT worship and superconductor speculation at the same time.

The least interesting phenomenon revealed so far is that HN is split into a group who are entertained by watching and discussing emerging tech / science news, and a second group who are entertained by disparaging the first. I enjoy watching floating rocks and talking to computers.

And there’s the third group that likes to comment on meta-hn behavior in a disparaging way

Re: Electronic Structure of LK-99

#172

Post by larperdoodle »

sheepscreek wrote: post #102
girvo wrote: post #70

Earlier quoted context omitted.

> It's not dumber So I absolutely agree with this. And yet this meme persists. I wonder what's creating the feeling that it's "dumber" in so many? Perhaps they're just noticing the limits that always existed previously? I'm not sure, and am interested in others thoughts on it.

ChatGPT as in the paid subscription hosted by OpenAI. Its quality has deteriorated. It will miss the simplest details in the prompt and hallucinate a lot. I’ve only noticed this before on models with lesser parameters. In comparison, Bard and Claude are getting better with time.

They've added a lot of safety features. Knowing very little about LLMs, I would assume these prepended prompts are using up a chunk of the limited "attention" the transformer has

Re: Electronic Structure of LK-99

#173

Post by sagarpatil »

jeffbee wrote: post #16

The most interesting phenomenon revealed so far is that the room-temperature superconductor people and the generative-LLMs-are-God people draw on the same limited global pool of credulity, such that HN cannot be flooded with both ChatGPT worship and superconductor speculation at the same time.

Guilty. I’m obsessed with LLM and LK-99. And in the past, was attracted crypto and NFT(which was a bubble)

Re: Electronic Structure of LK-99

#174

Post by wredue »

dekhn wrote: post #65
cantrevealname wrote: post #41

Earlier quoted context omitted.

The next breakthrough we need is with fusion technology. With unlimited fusion energy, room temperature superconductivity, and (soon) artificial general intelligence, the singularity won't be long off.

Yes, a combination of fusion, superconductivity, and AGI would indeed be transformative. It's hard to anticipate what the results would look like. Good reading: https://en.wikipedia.org/wiki/Post-scarcity https://en.wikipedia.org/wiki/Kardashev_scale then follow it up with a bit of 1993, https://edoras.sdsu.edu/~vinge/misc/singularity.html and https://web.pa.msu.edu/people/yang/RFeynman_plentySpace.pdf (oh, huh, I ju…

We’re nowhere near AGI dude, even with several breakthroughs.

AI today is a glorified search algorithm.

Re: Electronic Structure of LK-99

#175

Post by odyssey7 »

xorbax wrote: post #147
arriu wrote: post #106

Earlier quoted context omitted.

Im sure I’m not the only person thinking 24 years is way too long for such an important advancement. Huge respect for those in this field or others that don’t give up after so many years. Thank you

24 years is nothing in the scale of the universe If it increases entropy as much as many suspect and it only took 1/3 of a couple humans' lives to open that phase space, the Universe has done what it wanted - to hasten heat-death.

Interesting angle — but if heat death were possible it would have happened by now.

Re: Electronic Structure of LK-99

#176

Post by lucubratory »

Baeocystin wrote: post #157
oceanghost wrote: post #150

Earlier quoted context omitted.

A diamagnetic material. "In simple terms, diamagnetic materials are substances that are usually repelled by a magnetic field. Electrons in an atom revolve around the nucleus, and thus possess orbital angular momentum. The resultant magnetic momentum in an atom of the diamagnetic material is zero."

Am I correct in my understanding that being capable of self-levitation would be an unusually strong example of the diamagnetic effect?

Yes, if this material is diamagnetic without being a superconductor it is by far the strongest such material we've ever found. 15x stronger than pyrolitic graphite.

Re: Electronic Structure of LK-99

#177

Post by rtpg »

semajian wrote: post #114
chc4 wrote: post #80

Earlier quoted context omitted.

More people saying it sounds feasibly like it could be a superconductor is great, but agreed - https://nitter.net/MichaelSFuhrer/status/1686267690770739200 and similar threads by actual experts in the field have outlined that DFT studies ignore a lot of variables that need to line up for superconductivity, in harsh contrast to techbros on Twitter claiming they're proof of the next thousand year golden era.

Thanks for linking someone who knows what he's talking about, very painful to see these DFT papers overhyped as some kind of proof... It proves almost nothing

What does DFT prove beyond the pedantic "it proves what it proves"? Or rather, does it not heavily lean towards some reality?

Re: Electronic Structure of LK-99

#178

Post by tavavex »

Baeocystin wrote: post #157
oceanghost wrote: post #150

Earlier quoted context omitted.

A diamagnetic material. "In simple terms, diamagnetic materials are substances that are usually repelled by a magnetic field. Electrons in an atom revolve around the nucleus, and thus possess orbital angular momentum. The resultant magnetic momentum in an atom of the diamagnetic material is zero."

Am I correct in my understanding that being capable of self-levitation would be an unusually strong example of the diamagnetic effect?

From what I heard, it would. This kind of diamagnetism would be strong enough to be potentially interesting in other applications and research, if it turns out not to be a superconductor.

Re: Electronic Structure of LK-99

#179

Post by cthalupa »

odyssey7 wrote: post #175
xorbax wrote: post #147

Earlier quoted context omitted.

24 years is nothing in the scale of the universe If it increases entropy as much as many suspect and it only took 1/3 of a couple humans' lives to open that phase space, the Universe has done what it wanted - to hasten heat-death.

Interesting angle — but if heat death were possible it would have happened by now.

Huh? Heat death of the universe is going to take an incomprehensibly large amount of time. Like, 10^106 years.

The universe is A LOT younger than that.

Re: Electronic Structure of LK-99

#180

Post by qiqitori »

redox99 wrote: post #126
qiqitori wrote: post #89

The material containing lead is very unfortunate. I have no doubts that (if it indeed turns out to be a superconductor) humans will use it anyway in any context where it provides even a slight benefit (cf. just in the lead department: leaded gasoline, leaded solder, etc.).

Lead solder is mostly ok. Arguably lead free solder has been much more damaging for the environment because of all the e-waste it created.

> lead free solder has been much more damaging for the environment because of all the e-waste it created.

We're getting quite off-topic here (I guess I should have used different examples), but I would be interested where you got that information from. Most consumer electronics devices do not break prematurely, and especially not due to soldering issues. Source: I buy most electronics second-hand, I regularly repair electronics RoHS and not RoHS, I use lead-free solder and occasionally leaded solder, I watch a bunch of Youtube videos by other people who repair a bunch of electronics, just for fun. (You'll always (and easily) find someone who knows more than me, and it's entirely possible that you do.)

Most consumer electronics devices are retired because their owners got something shinier, or if "broken", it's the battery, display, or some important connector. If something is "actually" broken, it's usually due to power ICs, capacitors, fuses. (You could of course argue that some broken connectors are a case of a soldering issue, but yeah, it's not like I haven't seen broken connectors that were actually soldered using leaded solder, so things can get kind of muddy there)

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