Wightman function and Casimir densities for Robin plates in the Fulling-Rindler vacuum

Details Wightman function and Casimir densities for Robin plates in the Fulling-Rindler vacuum Wightman function and Casimir densities for Robin plates in the Fulling-Rindler vacuum

2005-04-23

arxiv.org/abs/hep-th/0504189v2

Int.J.Mod.Phys. A21 (2006) 2353-2375

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, 2 figures, discussion added, accepted for publication in Int. J. Mod. Phys. A

Scientific paper

10.1142/S0217751X06028515

Wightman function, the vacuum expectation values of the field square and the energy-momentum tensor are investigated for a massive scalar field with an arbitrary curvature coupling parameter in the region between two infinite parallel plates moving by uniform proper acceleration. We assume that the field is prepared in the Fulling-Rindler vacuum state and satisfies Robin boundary conditions on the plates. The mode-summation method is used with a combination of a variant of the generalized Abel-Plana formula. This allows to extract manifestly the contributions to the expectation values due to a single boundary and to present the second plate-induced parts in terms of exponentially convergent integrals. Various limiting cases are investigated. The vacuum forces acting on the boundaries are presented as a sum of the self-action and 'interaction' terms. The first one contains well known surface divergences and needs a further renormalization. The 'interaction' forces between the plates are investigated as functions of the proper accelerations and coefficients in the boundary conditions. We show that there is a region in the space of these parameters in which the 'interaction' forces are repulsive for small distances and attractive for large distances.

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