Isn't everything reversible if enough information is stored? Instead of COPY [A,... | Hacker News

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		mistaken on July 22, 2018 \| parent \| context \| favorite \| on: Reversing cause and effect is no trouble for quant... Isn't everything reversible if enough information is stored? Instead of COPY [A, B] -> [A, A]; you could have [A, B, 0] -> [A, A, B] which saves the value of B.

ahakki on July 22, 2018 [–]

IIRC this is how you implement stuff, you always keep the inputs, so everything stays reversible.

lisper on July 22, 2018 | [–]

Yes, but "keeping the inputs" is non-trivial in quantum-land because of the no-cloning theorem. You can't just make a copy of your inputs and stash them. You have to be more clever than that.

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