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Paper   IPM / Physic / 7282
School of Physics
  Title:   Casimir Energy-Momentum Tensor for A Brane in de Sitter Spacetime
1.  M.R. Setare
2.  A. A. Saharian
  Status:   Published
  Journal: Phys. Lett. B
  Vol.:  584
  Year:  2004
  Pages:   306-314
  Supported by:  IPM
Vacuum expectation values of the energy-momentum tensor for a conformally coupled scalar field is investigated in de Sitter (dS) spacetime in presence of a curved brane on which the field obeys the Robin boundary condition with coordinate dependent coefficients. To generate the corresponding vacuum densities we use the conformal relation between dS and Rindler spacetimes and the results previously obtained by one of the authors for the Rindler counterpart. The resulting energy-momentum tensor is non-diagonal and induces anisotropic vacuum stresses. The asymptotic behaviour of this tensor is investigated near the dS horizon and the boundary.

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