On 2021-09-21 10:04:AM, Matt Mahoney wrote:
Quantum operations have to be time reversible. For example, you can
flip qubits or swap 2 qubits or conditionally flip or swap qubits
depending on another. All of these operations can be run in reverse to
get the previous state. Writing to memory is not time reversible
because you can't recover the old value. Same with updating a
parameter in a neural network.
Reversibility doesn't make much of a difference. Quantum computers,
classical
computers, reversible computers and neural networks are all Turing complete.
They can all simulate each other. So: you can have reversible neural
networks,
and reversible writes to memory - no problem. Reversibility is not a big
deal.
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|im |yler http://timtyler.org/ t...@tt1.org 617-671-9930
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