Time Dependence of Hawking Radiation Entropy

  title={Time Dependence of Hawking Radiation Entropy},
  author={Don N Page},
  journal={Journal of Cosmology and Astroparticle Physics},
  • D. Page
  • Published 21 January 2013
  • Physics
  • Journal of Cosmology and Astroparticle Physics
If a black hole starts in a pure quantum state and evaporates completely by a unitary process, the von Neumann entropy of the Hawking radiation initially increases and then decreases back to zero when the black hole has disappeared. Here numerical results are given for an approximation to the time dependence of the radiation entropy under an assumption of fast scrambling, for large nonrotating black holes that emit essentially only photons and gravitons. The maximum of the von Neumann entropy… 

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