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Landauer's principle intuitively: the laws of physics are reversible, and therefore two distinct states (1 or 0) always map to two distinct states (1 or 0, evol
by mjfl 7y ago
Landauer's principle intuitively: the laws of physics are reversible, and therefore two distinct states (1 or 0) always map to two distinct states (1 or 0, evolved). So how can you erase a bit - take a 1 or 0 and map them to a 0? The answer is that you have to send the 0 or 1 to the environment i.e. map 1 or 0 to (system,environment) = (0,1) or (0,0) , which manifests as the dissipation of heat.
- derefr 7y agoSo where does the information go upon the final heath death of the universe? Does it become encoded by, say, the final diameter of the post-expansion universe (i.e. by some "environmental" property at the sub-quantum field level)?
- akvadrako 7y agoThere is no environment when you are considering the entire universe. This means it evolves unitarily and no information is ever erased.
- kgwgk 7y ago> evolves unitarily and no information is ever erased. Nor created.
- zitterbewegung 7y agoThe information doesn’t go anywhere. In the heat death of the universe all particles are at absolute zero due to the heat of the universe spreading uniformly in the vacuum of space.
- moultano 7y agoThe heat death is when the universe is in it's maximal information state.