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It really annoys me that according to Laplace, a demon knowing the state of any particule in the universe could predict its evolution in the future, but quantum theory just say the opposit. Knowing current state of the univers, you can “predict” everything that has past, but not how it will evolve in the future. Like if present was the cause of everything that happened in the past and we just experiencing time backward.

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marcos@lemmy.world ⁨5⁩ ⁨days⁩ ago

Knowing current state of the univers, you can “predict” everything that has past

The observer effect is irreversible. Quantum mechanics is reversible only because it the effect technically falls outside of the mechanics.

In related news, the entropy of a closed system is usually not constant.

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- Godric@lemmy.world ⁨5⁩ ⁨days⁩ ago
  Wouldn’t the act of observing be baked in from the start, and therefore accounted for?
  
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  - marcos@lemmy.world ⁨5⁩ ⁨days⁩ ago
    I don’t know what you are trying to say. But you can’t predict the state something had before you observed it from the stuff you see.
    
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