Yet it's not clear that they actually demonstrated quantum supremacy.
See https://scottaaronson.blog/?p=5868
Brent
On 10/26/2021 7:45 AM, John Clark wrote:
In yesterday's issue of the journal Physical Review Letters
researchers in China report they have performed a calculation in a
problem that has 10^43 dimensions in Hilbert space 10^24 times faster
than the largest conventional supercomputer using the best
conventional algorithm can. The calculation solved was about something
called "Boson Sampling" which doesn't seem to have much application in
itself but is a good proof of concept that a Quantum Computer can do
things that a conventional computer can't. Google solved a vastly
smaller problem in Boson Sampling about a year ago and claimed quantum
supremacy using a 53 qubit Quantum Computer, the Chinese used a 56
qubit Quantum Computer, that may seem like just a small increase but
with Quantum Computers things build exponentially so that the problem
the Chinese were able to solve was astronomically more complex than
the one Google had solved a year ago.
Strong Quantum Computational Advantage Using a Superconducting Quantum
Processor
<https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.180501>
Phase-Programmable Gaussian Boson Sampling Using Stimulated Squeezed
Light
<https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.180502>
Huge Leap for Quantum Primacy <https://physics.aps.org/articles/v14/147>
John K Clark See what's on my new list at Extropolis
<https://groups.google.com/g/extropolis>
nnq
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