Hawking Radiation in the Ghost Condensate is Non-Thermal

TL;DR

This paper demonstrates that Hawking radiation in a ghost condensate background around a Schwarzschild black hole is non-thermal and suppressed, challenging the standard thermodynamic interpretation of black hole entropy.

Contribution

It shows that in a ghost condensate background, Hawking radiation is non-thermal and suppressed, indicating deviations from standard black hole thermodynamics.

Findings

Hawking radiation is highly suppressed in ghost condensate backgrounds.

The radiation spectrum is non-thermal, unlike standard black hole radiation.

Such black holes can violate the generalized second law of thermodynamics.

Abstract

We consider a Schwarzschild black hole immersed in a ghost condensate background. It is shown that the Hawking radiation in the quanta of small perturbations around this background is highly suppressed- in particular it is not given by a thermal spectrum. This result is in accord with observations that such black holes can be used to violate the generalized second law of thermodynamics, and thus cannot have a standard entropy/area relation.