On 06-04-2022 13:35, Bruce Kellett wrote:
On Wed, Apr 6, 2022 at 9:47 AM smitra <smi...@zonnet.nl> wrote:
On 05-04-2022 01:24, Bruce Kellett wrote:
I have seen attempts at such accounts. The trouble is that
Aspect's
experiments were not performed in a quantum computer! It is
Aspect's
experiments that are to be explained.
It would be more interesting if you could give such an account for
a
classical computer. What is it that is significant about the QC?
It is
generally understood that a quantum computer might give a speed-up
on
some tasks, but it cannot actually do anything that a classical
computer could not do, given sufficient time.
The interesting question is why quantum computer accounts do not
correspond to laboratory experience. I think it has something to
do
with the formation of permanent records. But you might have a
better
account.
There is a theorem that says that systems that can create
entanglement
while complying with locality must be non-classical:
https://arxiv.org/abs/1907.08994
So, this is a settled issue.
I agree. Entanglement is a distinctively quantum phenomenon and cannot
be simulated classically. But that does not mean that using a quantum
computer will necessarily enable you to simulate a Bell experiment.
The quantum computer operates essentially by classical logic. So
unless you somehow generate a quantum entanglement (outside of the
necessary entanglement for the operation of the computer's qubits),
you are not going to be able to simulate a Bell entangled state, even
on a quantum computer.
You can't do it "from the outside" but you can consider observers
simulated by a quantum computer. The dynamics of a quantum computer is
manifestly local and unitary, so it provides for a transparent argument.
Saibal
Bruce
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