Wave Propagation in Stochastic Spacetimes: Localization, Amplification and Particle Creation

Details Wave Propagation in Stochastic Spacetimes: Localization, Amplification and Particle Creation Wave Propagation in Stochastic Spacetimes: Localization, Amplification and Particle Creation

1997-08-12

arxiv.org/abs/gr-qc/9708023v1

Phys.Rev. D57 (1998) 3474-3483

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

26 pages, 1 Postscript figure, submitted to Phys. Rev. D on July 29, 1997

Scientific paper

10.1103/PhysRevD.57.3474

Here we study novel effects associated with electromagnetic wave propagation in a Robertson-Walker universe and the Schwarzschild spacetime with a small amount of metric stochasticity. We find that localization of electromagnetic waves occurs in a Robertson-Walker universe with time-independent metric stochasticity, while time-dependent metric stochasticity induces exponential instability in the particle production rate. For the Schwarzschild metric, time-independent randomness can decrease the total luminosity of Hawking radiation due to multiple scattering of waves outside the black hole and gives rise to event horizon fluctuations and thus fluctuations in the Hawking temperature.

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