3 ms·
The only connection to black holes that I could find is, that they use mathematics first developed for string theory [1], so it's bit tenuous to say superconduc
by klimt 8y ago
The only connection to black holes that I could find is, that they use mathematics first developed for string theory [1], so it's bit tenuous to say superconductors are related to black holes. Once you read a few of these articles you start seeing the same tropes. I yearn for articles with less hype, and more honesty.
The main result of the paper seems to be Fig. 3B and Fig. 4B. The black line represents the limit set by the uncertainty principle, and they argue that all these superconductors lie right at the limit, which they call Planckian dissipation. However, I have a sense that a lot of cherry-picking data is going on. They claim this is a universal behaviour, but the paper doesn't even mention whether it applies to the most well-known and highest temperature superconductors like YBCO and HBCCO. I suspect because it doesn't. Another omission is NCCO, for which they have data for in Fig. 4A (from which Fig. 4B is calculated), but then they don't plot it in Fig. 4B. I am guessing because it again didn't match claim. I wonder how thorough the review process was, if at all.
[1] https://en.wikipedia.org/wiki/AdS/CFT_correspondence#Condensed_matter_physics https://en.wikipedia.org/wiki/AdS/CFT_correspondence#Condens...
- sir_kin 8y agoFrom my understanding, they're claiming that the linear resistance-temperature curve with a slope of h-bar is evidence that the electrons are in something akin to a maximally entangled state. Via the AdS-CFT correspondence, such a maximally entangled state is mapped to a black hole in AdS space in +1 dimensions. -- With regards to cherrypicking, I don't think they're suggesting all HTSC demonstrate this behavior, but rather that the same principle is responsible for this phenomena in all materials in which it occurs. -- I have certainly missed some details as I've never actually learned quantum field theory, so I'd appreciate someone more qualified correcting me.
- PeterWhittaker 8y agoThere is a symmetry between how quickly black holes can absorb matter/energy and scramble information and how quickly electrons in these materials can dissipate energy: Both do it as quickly as possible, with "as quickly as possible" being somehow related to h-bar. Is it a red herring or a pointer to some deeper, heretofore unexpected relationship? That's the cool part, no one yet knows.