• knightly the Sneptaur@pawb.social
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    23 hours ago

    To oversimplify, “information” is a very specific thing in quantum physics. Classical physics has the rule that energy can change form but cannot either be created or destroyed.

    Information works the same way in quantum physics, which makes black holes seem like a problem since their event horizons are inescapable and anything that falls inside is lost.

    • A_A@lemmy.world
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      22 hours ago

      Thanks, your explanation is interesting and makes sense at my level of abstraction.

      Eventually i would like it, if some physicist could come up with a cosmology where energy could be created and entropy of a close system could decrease … in specific conditions and in our present day universe.

      Also, in my naive understanding, chaotic pendulums creates information.

      • knightly the Sneptaur@pawb.social
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        21 hours ago

        “Information” in the quantum sense refers to waveform of the quantum system as a whole, which is kind of a weird thing to get one’s head around.

        Even in the case of chaotic pendulums, there’s no theoretical principle that keeps us from observing and accounting for every particle and quanta of energy involved and using that to prove that the waveform of the entire pendulum is consistent with itself and the expected evolution from previous states.

        But the event horizons of black holes seem to break that rule, because the waveforms of black holes can be described with just three properties; mass, charge, and spin. There didn’t seem to be “room” for them to encode all the waveforms of anything that falls inside until Stephen Hawking theorized that black holes gradually radiate away their energy, releasing their trapped information in the process.