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Restoring predictability in semiclassical gravitational collapse · Around

2013

Restoring predictability in semiclassical gravitational collapse

Brustein, Ram, Medved, A. J. M.

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Hawking showed that the radiation emitted from a classical collapsing shell is thermal.

Here, we show that a semiclassical collapsing shell emits radiation that is only approximately thermal, with small but significant deviations.
The most important difference is the presence of small off-diagonal elements in the radiation density matrix with a magnitude of order $1/\sqrt{S_{BH}}$, $S_{BH}$ being the Bekenstein-Hawking entropy of the incipient black hole.
The off-diagonal elements store the correlations between the collapsing shell and the emitted radiation and allow information to continuously leak from the collapsed body.

Built on

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