I meant to say different authors, but for some reason I wrote the same. This looks like a material that has a lot of interest out there.
LC On Wednesday, August 21, 2019 at 8:04:25 PM UTC-5, Lawrence Crowell wrote: > > Here is a paper by the same authors that appears to address this physics. > It is not the science magazine article, but it covers the same material. It > is an experimental paper. As a topological superconductor that is defined > on edge states on the boundary it appears this is a 2-dimensional surface > and there is a mixture between anyonic statistics and fermionic Cooper > pairing of electrons with opposite momenta. This has some theoretical > implications. The authors talk of nonabelian stats, which I think refer to > anyons, and the nonabelian aspects may be with this quantum blurring of > anyonic and superconductive physics. > > https://arxiv.org/pdf/1908.07396.pdf > > LC > > On Wednesday, August 21, 2019 at 5:56:22 PM UTC-5, John Clark wrote: >> >> In my opinion a scalable quantum computer could bring about a >> singularity in human affairs as surely as Drexler's nanotechnology, and the >> most promising way of achieving this is through a fault tolerant >> topological quantum computer. In the current issue of the journal Science >> (August 16 2019) a revolutionary new type of superconductor has been >> discovered, uranium ditelluride (UTe2), that may turn out to have some >> considerable bearing on this. Nick Butch, from the National Institute of >> Standards and one of the authors of the paper says: >> >> *"This is potentially the silicon of the quantum information age. You >> could use uranium ditelluride to build the qubits of an efficient quantum >> computer."* >> >> ferromagnetic spin-triplet superconductivity >> <https://science.sciencemag.org/content/365/6454/684> >> >> Uranium Ditelluride is a very unusual superconductor for several reasons: >> >> 1) It is a topological superconductor, meaning that the interior is a >> insulator but the surface is a superconductor. >> 2) It can tolerate enormously strong magnetic fields, much higher than >> other superconductors. >> 3) Most superconductors are spin singlet, this means that the spins in >> the electrons in the Cooper Pairs, which carry the electrical current in >> all superconductors, are lined up in a antiparallel direction; but Uranium >> Ditelluride is spin triplet, their electron spins are perpendicular. >> >> All this adds up to the surface of uranium ditelluride being the ideal >> stage set to produce logic gates made of Majorana pseudoparticles that >> obey non-Abelian statistics. And that means you could store quantum >> information topologically which would make it very resistant to quantum >> decoherence for the same reason you're unlikely to be able to untie a knot >> by just bumping it, you might change its shape but not its topological >> properties. And quantum decoherence is by far the most important >> obstacle we must overcome if we want to build a scalable quantum computer. >> >> And that is not the only new development in the last few weeks, Javad >> Shaban and his team found something similar in Indium arsenide (InAs) >> although you must get it much colder before it becomes superconducting, >> .007 Kelvin verses 1.6 Kelvin for Uranium ditelluride. >> >> Phase signature of topological transition in Josephson Junctions >> <https://arxiv.org/pdf/1906.01179.pdf> >> >> Dr. Shabani said: >> *"We see value in these particles because of their potential to store >> quantum information in a special computation space where quantum >> information is protected from the environment noise. As a result, we have >> sought to engineer platforms on which these calculations could be >> conducted. The new discovery of topological superconductivity in a >> two-dimensional platform paves the way for building scalable topological >> qubits to not only store quantum information, but also to manipulate the >> quantum states that are free of error. These findings strongly supports the >> emergence of a topological phase in the system. This offers a scalable >> platform for detection and manipulation of Majorana bounds states for >> development of complex circuits for fault-tolerant topological quantum >> computing."* >> >> By the way, the leading company in all this is none other than Microsoft. >> >> John K Clark >> >> -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/7b4767c7-3bab-4d3d-9cc0-4b1a638c09c1%40googlegroups.com.
