Vacuum fluctuations for spherical gravitational impulsive waves

Details Vacuum fluctuations for spherical gravitational impulsive waves Vacuum fluctuations for spherical gravitational impulsive waves

1998-03-18

arxiv.org/abs/gr-qc/9803063v2

Class.Quant.Grav. 13 (1996) 2683-2691

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Class. Quantum Grav. 13(1996) 2683-2691

Scientific paper

10.1088/0264-9381/13/10/008

We propose a method for calculating vacuum fluctuations on the background of a spherical impulsive gravitational wave which results in a finite expression for the vacuum expectation value of the stress-energy tensor. The method is based on first including a cosmological constant as an auxiliary constant. We show that the result for the vacuum expectation value of the stress-energy tensor in second-order perturbation theory is finite if both the cosmological constant and the infrared parameter tend to zero at the same rate.

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