Hawking-like radiation from the apparent horizon in an FRW Universe : Quantum Corrections

Details Hawking-like radiation from the apparent horizon in an FRW Universe : Quantum Corrections Hawking-like radiation from the apparent horizon in an FRW Universe : Quantum Corrections

2011-06-22

arxiv.org/abs/1106.4370v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages

Scientific paper

In this paper we study Hawking-like radiation in a FRW-Universe using semi-classical tunnelling approach and the Hamilton-Jacobi method. Radial null geodesics are used to picture the process as a "tunnelling" of particles from behind the apparent horizon and Hawking -like temperature has been calculated. Quantum corrections have been evaluated in the Hamilton-Jacobi Method by solving Klein-Gordan wave equation and the temperature agrees at the semiclassical level. Also it is found that Hamilton-Jacobi formalism does not depend on the choice of the coordinate system. Finally, leading order corrections to entropy has been calculated.

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