On 5/14/2023 4:41 AM, John Clark wrote:
On Sat, May 13, 2023 at 8:12 PM Brent Meeker <meekerbr...@gmail.com>
wrote:
/> It won't be a big deal because, so far, quantum computers have
only a very small domain where they are superior. And even if they
were a million times faster across the board, it's not clear how
that would change things? What practical problems are there that
would go from usoluble to soluble by computers being a million
times faster?/
Any calculation involving quantum mechanics could be done billions or
trillions of times faster on a quantum computer. It's easy to
calculate the light spectrum of hydrogen, the simplest element, but
doing the same thing for helium the second simplest , requires months
of calculations on the largest supercomputer on earth, and the sun
will turn into a red giant before such a computer could calculate the
spectrum of one of the heavier elements. And trying to figure out what
spectrum molecules will produce is even more difficult.
Yes, some things are faster to measure than to calculate. And I note
that recently a classical algorithm was found for folding of proteins
(which was formerly touted as THE application for quantum computation):
And suppose you have an old-fashioned telephone book for Manhattan
that has 1 million entries in it and you had a telephone number but no
name to go with it. If you use a classical algorithm to find the name
that matches that number it would take you on average 500 thousand
steps before you found the match, but if you used Grover's quantum
algorithm then it would only take you the square root of a million
steps, just one thousand steps not 500thousand. And when quantum
computers become available for hackers to play with I have no doubt
they will find many more useful algorithms.
John K Clark See what's on my new list at Extropolis
<https://groups.google.com/g/extropolis>
w3x
Brent
On 5/13/2023 2:58 PM, John Clark wrote:
On Sat, May 13, 2023 at 5:14 PM Lawrence Crowell
<goldenfieldquaterni...@gmail.com> wrote:
/> Curious, for a part of my discussions with GPT-4 involve
the relationship between anyons and a lattice form of
supersymmetry. Nonabelions can then act as a sort of
supersymmetric protection of quantum states./
If this can be made practical then this new development will be a
very big deal, in fact about as big a dealas deals get. And as
far as I can tell there are no scientific roadblocks, just
engineering difficulties. They're virtual 2D Nonabelions not real
ones but as far as making a topological quantum computer is
concerned that distinction is not very important.
John K Clark See what's on my new list at Extropolis
<https://groups.google.com/g/extropolis>
naa
On Wednesday, May 10, 2023 at 1:58:03 PM UTC-5 John Clark wrote:
As if all the news aboutGPT-4 were not enough, this is an
article from the journal Nature that that went online
yesterday:
Physicists create virtual nonabelions for fault-tolerant
quantum computers
<https://www.nature.com/articles/d41586-023-01574-0?utm_source=Nature+Briefing&utm_campaign=c182f988e0-briefing-dy-20230510&utm_medium=email&utm_term=0_c9dfd39373-c182f988e0-44221073>
It's about a preprint that just went online; they claim
"/unambiguous realization of non-Abelian topological
order and demonstrate control over them/". Technically
they're virtual Anyons not real ones, but from the
perspective of an engineer trying to make a Fault
Tolerant Quantum Computer the difference between real and
virtual is not important:
Creation of Non-Abelian Topological Order and Anyons on a
Trapped-Ion Processor <https://arxiv.org/abs/2305.03766>
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