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Electronic Structure of LK-99

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Re: Electronic Structure of LK-99

#291

Post by anhner »

dralley wrote: post #30

My understanding is that the "99" in LK-99 is the year it they first synthesized the material, i.e. 1999. Assuming this is all true, why is it just now coming to light? Did they just not know what they had? (I have not been following this closely, maybe this has already been explained)

wild assumption, but maybe they accidentally made a small sample of high grade LK-99 back in 1999 that displayed the superconductor properties, and they had difficulty replicating. Maybe they spent all these years refining the process

Re: Electronic Structure of LK-99

#292

Post by pjc50 »

vesinisa wrote: post #26
appplication wrote: post #20

This ongoing research saga pretty much the most excited I’ve been about anything since before Covid. It feels like the science equivalent of watching your favorite sports team on an epic rise towards winning a world championship. Even if this turns out to flop, I hope history remembers the original authors favorably. They really did find something that by all accounts could plausibly be a room temp superconductor. An…

Just curious, how did you find Covid "exciting"? Making lots of money on the bear market?

mRNA vaccines are a huge discovery, not quite as powerful as room temperature superconductors but still up there in terms of impact on humanity. And encountered a very different kind of skepticism while ultimately turning out to be not only real but widely deployed with great speed.

Re: Electronic Structure of LK-99

#293

Post by pjc50 »

philosopher1234 wrote: post #79
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 biggest threat to Bitcoin wasn’t apt criticism. It was a nexter bigger thing.

Like Theranos, the secret ingredient turned out to be fraud, and the big threat is jail.

Re: Electronic Structure of LK-99

#294

Post by jjahdhnmko »

serf wrote: post #170
johncalvinyoung wrote: post #130

Earlier quoted context omitted.

As someone strongly in the first camp and not the second, this feels like a very odd observation. I despise generative LLMs and avoid using them at every opportunity. I'm also spending all my free time this week perusing arxiv preprints and Twitter threads. Make of my datum what you will. :)

> I despise generative LLMs and avoid using them at every opportunity. why? it's just a tool. despise how it was released, how it was trained, the people that operate it , whatever, but I can't really understand why someone would 'despise' a wrench -- even if it was used really poorly and produced by a shady company with a checkered past.

You really can't think of a reason? Or you don't want to think of a reason?

Re: Electronic Structure of LK-99

#295

Post by refulgentis »

WithinReason wrote: post #272
refulgentis wrote: post #45

Earlier quoted context omitted.

It's not dumber. You can verify this on their models with any prompt you ran at 0.0 when it first came out, I did. It's the exact same model run the same exact way. They've repeatedly confirmed this.

It is and it's documented: https://arxiv.org/abs/2307.09009

A) its wrong and caused a lot of hand wringing about Arxiv and undergrads B) Not my claim, those are two different models

Re: Electronic Structure of LK-99

#296

Post by Narretz »

DoreenMichele wrote: post #55
mrleinad wrote: post #51

Earlier quoted context omitted.

Next is that UFOs are real

Unidentified Flying Objects are absolutely real, though the newer cool kid term is UAP. (From the internet: UAP stands for "unidentified anomalous phenomena." ) It's flying saucers carrying aliens from another planet that's controversial and up for debate.

I thought UAP stands for "unidentified aerial/aerospace phenomenon". Anyway it's better than UFO because it primes you for the fact that many "UFOs" are not flying at all. Many are stars, lights of all kinds, or artifacts of the the recording equipment.

Re: Electronic Structure of LK-99

#297

Post by cthalupa »

pjc50 wrote: post #284
feoren wrote: post #281

Earlier quoted context omitted.

> Meanwhile over in the AI "optimism" channel people are telling us ... I'm not sure why this line of reasoning is so prevalent. Someone says "There's strong evidence for A" and the reply is "yes but someone who is not currently in the conversation also said there was strong evidence for B and that is wrong! Therefore you are silly for believing in A!" What? We're not supposed to be optimistic when we see strong evid…

My argument was that the _video_ evidence is not strong, because it's poor quality and videos are easy to fake, while also linking this to another piece of techno-optimism which has made it easier to fake videos.

And that's why you shouldn't particularly believe videos without providence.

However, we have videos being posted by PhDs at universities and their students. The stakes are quite a bit higher if it turns out they were faking these videos - and will be quite readily apparent. This is easy enough to synthesize that there are hundreds of labs in the world working on replicating it. You'd be found out to be a fraud, fast, and for what reason? Twitter likes and retweets for a few weeks? Why would you ruin your career over that?

Re: Electronic Structure of LK-99

#298

Post by Gud »

IX-103 wrote: post #124
boppo1 wrote: post #90

Earlier quoted context omitted.

What fusion breakthrough is needed that isn't superconductors?

Computational electrodynamics. We need to design better geometries for reactors so that we can channel the plasma flow to better improve containment while quickly removing wastes from the highly compressed energetic region where fusion mostly occurs. If we could do that, then that mostly solves the issues from reactor degradation and significantly improves efficiency. The trouble is that at such high energy levels th…

Is this really a requirement, or a nice to have kind of thing? Commonwealth Fusion Systems are using a pretty basic design and seem pretty confident it will work

Re: Electronic Structure of LK-99

#299

Post by DoreenMichele »

Narretz wrote: post #296
DoreenMichele wrote: post #55

Earlier quoted context omitted.

Unidentified Flying Objects are absolutely real, though the newer cool kid term is UAP. (From the internet: UAP stands for "unidentified anomalous phenomena." ) It's flying saucers carrying aliens from another planet that's controversial and up for debate.

I thought UAP stands for "unidentified aerial/aerospace phenomenon". Anyway it's better than UFO because it primes you for the fact that many "UFOs" are not flying at all. Many are stars, lights of all kinds, or artifacts of the the recording equipment.

I thought so too. I googled it and came up with the above quote but didn't provide the link.

Happy to be corrected if someone has a good source they can cite.

It is a better term overall and also lacks the baggage of being used colloquially to mean "aliens."

Re: Electronic Structure of LK-99

#300

Post by bluescrn »

swalsh wrote: post #95
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.

It's so hard not to be crazy excited about the future. The past few months are proving to be an absolute breakout for the literal human race. So far we've seen: 1. in Dec 2022 We saw a fusion breakthrough seeing a net gain in energy 2. In March GPT-4 was released, which seems to be a seminal breakthrough in AI, and maybe of our first glimpse in what could become an AGI. 3. In May we find out apparently our government…

But at the same time, we may already be in the early stages of the collapse of western civilisation, with or without Russia/Ukraine escalating into WW3.
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