On Friday, July 10, 2020 at 7:11:39 AM UTC-5, Bruno Marchal wrote: > > > On 9 Jul 2020, at 13:14, Lawrence Crowell <goldenfield...@gmail.com > <javascript:>> wrote: > > On Thursday, July 9, 2020 at 5:59:04 AM UTC-5, Bruno Marchal wrote: >> >> >> On 7 Jul 2020, at 20:05, 'Brent Meeker' via Everything List < >> everyth...@googlegroups.com> wrote: >> >> I thought the big application of QC after encryption, was going to be >> protein folding and similar biomolecular interactions. >> >> >> >> That is how Feynman discovered quantum computation, in a more informal >> way than Deutsch quantum universal Turing machine. >> >> You thought? What did change your mind? Quantum simulation will be the >> main application of quantum computations for the millennia to come … once >> we get genuine big frame quantum computer. >> >> I agree with Clark that topological quantum computation is the most long >> term promising path, but to squeeze an electron and braid its plane moves >> requires immense apparatus/magnet. The first genuine quantum computing >> machine might be very huge. That will not easily been miniaturised. But >> then IBM was using giant trucks to transport for its first 5Mb hard drive >> in 1955, and I expect huge progress in condoned matter physics, and some >> serendipitous discovery along the way… >> >> Bruno >> >> > Graphene reduces the dimension of QM to 2-space plus time. In effect it is > two dimension if the wavelength of quantum states is longer than any atomic > thickness to the sheets. > > > Interesting. I can conceive this makes sense, but I am not sure this > indicates that we could use Graphene for quantum topological computation. I > am not sure you could consider the electron of a layer of graphene to be > “squeezed” in 2D, at least in a manner so that you can build a braid and > get a topological qubit. (I guess that you are not implying that in > graphene the electron themselves are confined in a 2D space?). > > Bruno > > > If there are no eigenstates in the direction perpendicular to the graphene sheet, then from a quantum mechanical perspective that dimension does not exist. QM is a bit strange that way, but what counts are not continuum ideas of space, but rather whether there are eigenstates that have observables corresponding to a particular direction.
LC > > LC > > >> >> >> >> Brent >> >> On 7/7/2020 4:56 AM, Philip Thrift wrote: >> >> >> Dr. B may still be right though. >> >> 30 years from now quantum computers (as promoted in 2020) will still have >> no impact on practical computing applications. Maybe in cryptography, or >> maybe not. >> >> Though quantum aspects in materials science could turn out to be useful, >> so its impact on computing will be of a peripheral nature (in sensors, >> etc.). >> >> @philipthrift >> >> On Tuesday, July 7, 2020 at 5:59:54 AM UTC-5 johnk...@gmail.com wrote: >> >>> On Tue, Jul 7, 2020 at 6:44 AM Bruno Marchal <mar...@ulb.ac.be> wrote: >>> >>> > *If we can factorise a number sensibly bigger than 15 in my >>>> lifetime, I will be impressed* >>> >>> >>> Back in 2017 the number 291,311 was factored by a quantum computer: >>> >>> The experimental factorization of 291311 >>> <https://arxiv.org/pdf/1706.08061.pdf> >>> >>> 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 everyth...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/everything-list/e9c1b6d8-5ba1-4a43-96ba-6daad2ccb575n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/everything-list/e9c1b6d8-5ba1-4a43-96ba-6daad2ccb575n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> >> >> -- >> 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 everyth...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/everything-list/d32cfba8-347d-0cb6-df80-21c85d1edb49%40verizon.net >> >> <https://groups.google.com/d/msgid/everything-list/d32cfba8-347d-0cb6-df80-21c85d1edb49%40verizon.net?utm_medium=email&utm_source=footer> >> . >> >> >> > -- > 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 everyth...@googlegroups.com <javascript:>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/b998dc41-de35-4c23-b27a-6ca614986f22o%40googlegroups.com > > <https://groups.google.com/d/msgid/everything-list/b998dc41-de35-4c23-b27a-6ca614986f22o%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > > -- 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 everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/b6adc3c1-d8a8-4bd0-bde5-2c24434f02cfo%40googlegroups.com.
