Vacuum polarization by topological defects in de Sitter spacetime

Abstract

In this paper we investigate the vacuum polarization effects associated with a massive quantum scalar field in de Sitter spacetime in the presence of gravitational topological defects. Specifically we calculate the vacuum expectation value of the field square, $<{\Phi }^2>$. Because this investigation has been developed in a pure de Sitter space, here we are mainly interested on the effects induced by the presence of the defects.

Talk presented at the 1st. Mediterranean Conference on Classical and Quantum Gravity (MCCQG)

References in corpus (4)

• Cosmic F- and D-strings
• Formation and evolution of cosmic D-strings
• Polarization of the fermionic vacuum by a global monopole with finite core
• Vacuum Polarization of a Massless Scalar Field in the Background of a Global Monopole with Finite Core