Re: Quantum computing practically impossible

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On 2020/11/06 0:34, Joseph Touch wrote:


On Nov 4, 2020, at 10:44 PM, Viktor Dukhovni <ietf-dane@xxxxxxxxxxxx> wrote:

On Wed, Nov 04, 2020 at 11:23:32PM -0500, Phillip Hallam-Baker wrote:

It is my understanding of the work on Quantum error correction that it is
correcting errors in the measurement of quantum states rather than trying
to compensate for decoherence so the base assumption of the paper seems to
be off.

No.  That's not the case.  The scepticism around in principle
scalability of QCs is in fact centered on whether environmental noise
can be corrected in principle or not.

Noise isn’t the only focal point of skepticism; at least one other is full-entanglement scale, which has essentially remained static for decades (8-way recently leaping to 10-way).

Joe





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