Casimir densities for a boundary in Robertson-Walker spacetime

Details Casimir densities for a boundary in Robertson-Walker spacetime Casimir densities for a boundary in Robertson-Walker spacetime

2009-12-28

arxiv.org/abs/0912.5139v1

Phys.Lett.B687:253-257,2010

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, 1 figure

Scientific paper

10.1016/j.physletb.2010.03.041

For scalar and electromagnetic fields we evaluate the vacuum expectation value of the energy-momentum tensor induced by a curved boundary in the Robertson--Walker spacetime with negative spatial curvature. In order to generate the vacuum densities we use the conformal relation between the Robertson-Walker and Rindler spacetimes and the corresponding results for a plate moving by uniform proper acceleration through the Fulling--Rindler vacuum. For the general case of the scale factor the vacuum energy-momentum tensor is presented as the sum of the boundary free and boundary induced parts.

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