On Friday, July 10, 2020 at 7:11:39 AM UTC-5, Bruno Marchal wrote: > > > On 9 Jul 2020, at 13:14, Lawrence Crowell <[email protected] > <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 < >> [email protected]> 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 [email protected] wrote: >> >>> On Tue, Jul 7, 2020 at 6:44 AM Bruno Marchal <[email protected]> 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 [email protected]. >> 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 [email protected]. >> 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 [email protected] <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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/b6adc3c1-d8a8-4bd0-bde5-2c24434f02cfo%40googlegroups.com.
