Gravitational shock waves and vacuum fluctuations

Details Gravitational shock waves and vacuum fluctuations Gravitational shock waves and vacuum fluctuations

1998-02-11

arxiv.org/abs/hep-th/9802072v1

Class.Quant.Grav. 15 (1998) 1415-1420

Physics

High Energy Physics

High Energy Physics - Theory

Submitted to Class. and Quant. Grav.,7 pages, no figures

Scientific paper

10.1088/0264-9381/15/5/022

We show that the vacuum expectation value of the stress-energy tensor of a scalar particle on the background of a spherical gravitational shock wave does not give a finite expression in second order perturbation theory, contrary to the case seen for the impulsive wave. No infrared divergences appear at this order. This result shows that there is a qualitative difference between the shock and impulsive wave solutions which is not exhibited in first order.

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