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Chapter 03 of 5

The Information Paradox

Is knowing where a molecule is 'free' energy?

  1. The Dilemma

    A Mind in the Machine

    If the Demon doesn't use physical force to move molecules, it must use something else. That 'something' is its mind.

  2. The Insight

    Information as Fuel

    Maxwell realized the Demon needs to 'know' the velocity of every approaching particle. This makes knowledge a potential source of energy.

  3. Mechanism

    The Act of Observation

    To sort the molecules, the Demon must measure them. Each measurement produces a discrete piece of data about the system's state.

17 more cards in this chapter

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According to Leo Szilard's analysis, what must be factored into the physics of the Demon?

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😈 Maxwell’s Demon: Defying the Second Law

  1. 01The Tyranny of EntropyWhy the universe is destined for a cold, chaotic end.
  2. 02Enter the DemonMaxwell’s tiny gatekeeper attempts a logic-defying feat.
  3. 03The Information ParadoxIs knowing where a molecule is 'free' energy?
  4. 04Landauer’s LimitThe high cost of forgetting and the heat of erasure.
  5. 05The Physics of DataInformation is physical, not just an abstract idea.