Is there a fundamental physical limitation to the amount of space needed to contain a single bit?

Question

Is there a fundamental physical limitation to the amount of space needed to contain a single bit?

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Answer 1

A bit could be encoded on something like the spin of an atomic particle…particles which could be near pin-points in space. So no, I would not say there is a physical limitation (ie you need at least x amount of space to encode a bit). However once you’re getting down at the atomic level now you also have to deal with weird quantum effects such as the bit randomly changing or measuring the bit causing it to change…