Vacuum fluctuations for spherical gravitational impulsive waves


Hortacsu M.

CLASSICAL AND QUANTUM GRAVITY, vol.13, no.10, pp.2683-2691, 1996 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 10
  • Publication Date: 1996
  • Doi Number: 10.1088/0264-9381/13/10/008
  • Title of Journal : CLASSICAL AND QUANTUM GRAVITY
  • Page Numbers: pp.2683-2691

Abstract

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.