Fermion Tunneling from Dynamical Horizons

Details Fermion Tunneling from Dynamical Horizons Fermion Tunneling from Dynamical Horizons

2008-03-04

arxiv.org/abs/0803.0435v2

Europhys.Lett.82:60001,2008

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, standard Latex document, few references added

Scientific paper

10.1209/0295-5075/82/60001

The instability against emission of fermionic particles by the trapping horizon of an evolving black hole is analyzed using the Hamilton-Jacobi tunneling method. This method automatically selects one special expression for the surface gravity of a changing horizon. The results also apply to point masses embedded in an expanding universe. As a bonus of the tunneling method, we gain the insight that the surface gravity still defines a temperature parameter as long as the evolution is sufficiently slow that the black hole pass through a sequence of quasi-equilibrium states, and that black holes should be semi-classically unstable even in a hypothetical world without bosonic fields.

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