Entropy is only relative to an observer that forms memories
If information is conserved and the universe is finite, it's also cyclic, and the entropy law is false.
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Maybe, but that's not the standard view.
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Maybe not all information is conserved? Maybe it is impossible to see the past no matter what because entropy law is true?
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Interesting take. Also works if time is not?… does entropy works without time? first to come to mind is yes
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In smaller systems, it is not true at all. At least for some longer finite time series. Ie. Sun is a great input to closed systems. Perpetual systems are not science fiction
Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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If you consider all degrees of freedom in the universe, it's just one big wavefunction evolving unitarily, and hence entropy is globally conserved.
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The second law is about entropy of subsystems of the universe (i.e., most systems that are considered practically). Even if you have a global unitary, you have a second law of quantum complexity, which yields a second law for increased entropy of subsystems. It all checks out.
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Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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That the universe is cyclical does not mean it restart itself, the cycle can be arbitrarily short. A in a heat-dead universe all future states are indistinguishable, which can be seen as a one-state cycle. Thats an accepted view.
Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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There is no well defined entropy for the universe. (Technically, there is no global definition of energy, hence entropy, for non-stationary metric spacetimes).
Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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