Stress-energy tensor in the Bel-Szekeres space-time

Details Stress-energy tensor in the Bel-Szekeres space-time Stress-energy tensor in the Bel-Szekeres space-time

1998-02-19

arxiv.org/abs/gr-qc/9802050v1

Phys.Rev. D58 (1998) 104010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages, LaTex file, 2 PostScript figures

Scientific paper

10.1103/PhysRevD.58.104010

In a recent work an approximation procedure was introduced to calculate the vacuum expectation value of the stress-energy tensor for a conformal massless scalar field in the classical background determined by a particular colliding plane wave space-time. This approximation procedure consists in appropriately modifying the space-time geometry throughout the causal past of the collision center. This modification in the geometry allows to simplify the boundary conditions involved in the calculation of the Hadamard function for the quantum state which represents the vacuum in the flat region before the arrival of the waves. In the present work this approximation procedure is applied to the non-singular Bel-Szekeres solution, which describes the head on collision of two electromagnetic plane waves. It is shown that the stress-energy tensor is unbounded as the killing-Cauchy horizon of the interaction is approached and its behavior coincides with a previous calculation in another example of non-singular colliding plane wave space-time.

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