Physicists create virtual nonabelions for fault-tolerant quantum computers Inbox

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John Clark

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May 10, 2023, 2:58:03 PM5/10/23
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As if all the news about GPT-4 were not enough, this is an article from the journal Nature that that went online yesterday:


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: 


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Lawrence Crowell

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May 13, 2023, 5:14:55 PM5/13/23
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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.

LC

John Clark

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May 13, 2023, 5:59:38 PM5/13/23
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On Sat, May 13, 2023 at 5:14 PM Lawrence Crowell <goldenfield...@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 deal as 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.
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Lawrence Crowell

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May 13, 2023, 6:44:36 PM5/13/23
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On Saturday, May 13, 2023 at 4:59:38 PM UTC-5 John Clark wrote:
On Sat, May 13, 2023 at 5:14 PM Lawrence Crowell <goldenfield...@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 deal as 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
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This is a part of the topological order of quantum states. The nonabelion, a state isomorphic to an elementary supersymmetric state, acts as a symmetry protecting symmetry of states against quantum noise.

LC

Brent Meeker

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May 14, 2023, 3:18:48 PM5/14/23
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On 5/14/2023 4:41 AM, John Clark wrote:
On Sat, May 13, 2023 at 8:12 PM Brent Meeker <meeke...@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 500 thousand. And when quantum computers become available for hackers to play with I have no doubt they will find many more useful algorithms.

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Brent
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John Clark

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May 15, 2023, 7:21:53 AM5/15/23
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On Sun, May 14, 2023 at 3:18 PM Brent Meeker <meeke...@gmail.com> wrote:

>>ME: 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): 

True. We have quantum algorithms that can solve problems much faster than any known classical algorithm, however nobody has been able to prove that there is not a classical algorithm that can solve any problem just as fast as the quantum variety that we just haven't found yet. The reason we haven't been able to prove that is because nobody has been able to prove that P≠ NP even though nearly every mathematician alive believes that nondeterministic polynomial problems (problems that are hard to calculate but easy to check) can NOT be solved in polynomial time (problems with N elements in which the time required to solve increases as N gets larger as X^N, not  N^X). The P=NP question is perhaps the greatest unsolved problem in all of mathematics; if despite everybody's expectations it turns out that P really is equal to NP and if the algorithm could be found then it's true, you wouldn't need quantum computers, the conventional variety would work just as well. I could be wrong but I don't expect that to happen.  


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spudb...@aol.com

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May 15, 2023, 3:52:49 PM5/15/23
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What we need are not the algorithms, but the ice-cold machinery, coupled with AI to make the quantum leap technologically. Quantum computing is said to kick large errors along with faster processing. 

Breakthrough in quantum error correction could lead to large-scale quantum computers


If You Think AI Is Hot, Wait Until It Meets Quantum Computing


And always the big, BOO! of course!


Here's a thought for JC. What IF we soon, have server farms of quantum computers loaded with AI? All that cold, all that electrical power required, not bloody likely! But if, and your New Testament is accurate? Jesus then "descends from the clouds," meaning, cloud computing. Then, via QC+ AI & The Resurrection happens? 

Whatd'ya say?

Me Luv Quantum Woo! (I really do!). 
woo-woo-woo-woo!! -Curley Joe, Stooge. 




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