Welcome to the world of NISQ programming

[Philip Thrift]

http://nautil.us/blog/physicists-say-googles-quantum-computer-is-still-far-from-practical

Bottom line it seems: There may be quantum computers, but expect lots of errors.

So can NISQ (“noisy intermediate-scale quantum") programming ever be made useful?

@philipthrift

[spudb...@aol.com]

If the article is accurate and there is no rapid fix, then all the purported thousands of D-Wave entanglements result in only a few actual successful computer operations. 

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[Philip Thrift]

Maybe someday quantum computers will "work". But Nature by itself works perhaps with sloppy quantum computing, and there is no reason to expect QC machines will ever match QC un-sloppy math.

Sloppy quantum programming may be a thing that is useful someday.

@philipthrift

[John Clark]

From:

http://nautil.us/blog/physicists-say-googles-quantum-computer-is-still-far-from-practical

“I am presently quite worried that quantum computing will go the same way as nuclear fusion, that it will remain forever promising but never quite work.”

Ah... humans found a way to make nuclear fusion work as far back as 1952 when they made Ivy Mike, also known as the world's first H-bomb.

IVY-MIKE: THE FIRST HYDROGEN BOMB TEST

John K Clark

[John Clark]

On Thu, Oct 17, 2019 at 2:38 PM spudboy100 via Everything List <everyth...@googlegroups.com> wrote:

> If the article is accurate and there is no rapid fix, then all the purported thousands of D-Wave entanglements result in only a few actual successful computer operations. 

Unlike Google's or IBM's machine D-Wave's device is not Turing Complete and doesn't claim to be.

 John K Clark

[John Clark]

Actually I'm becoming increasingly skeptical that D-Wave's specialized device (you can't call it a computer because it's not Turing complete) will ever have a practical advantage over a conventional computer for any problem; they took heroic measures to cool it down to 0.015 degrees Kelvin but that's not cold enough. There are now theoretical reasons to think that with D-Wave's method as the problem size increases the temperature of the device must drop at least logarithmically and probably as a power law, so you're never going to be able to get it cold enough to compete against a conventional computer. Google, IBM and most other Quantum Computer companies don't use D-Wave's method and don't have this problem.

Temperature scaling law for quantum annealing optimizers

John K Clark

[spudb...@aol.com]

Not to run the coffee maker though. There is apparently some huge problem with making the physics work. 

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.

[spudb...@aol.com]

I am not not sure how good a replacement for conventional digital computing either? All quantum devices must be colder than hell (so far) and Allan Turing or not, these are practical devices and must do things that the conventional ones cannot. 

-----Original Message-----
From: John Clark <johnk...@gmail.com>

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.

[Philip Thrift]

I thought the expression was "quantum computing will go the same way as cold fusion".

https://en.wikipedia.org/wiki/Cold_fusion

@philipthrift