Adiabatic regularization method in inhomogeneous spacetime

Details Adiabatic regularization method in inhomogeneous spacetime Adiabatic regularization method in inhomogeneous spacetime

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phlb..258...40h&link_type=abstract

Physics Letters B, Volume 258, Issue 1-2, p. 40-44.

Physics

Scientific paper

It is well known that the adiabatic regularization method is applicable to evaluate numerically the renormalized stress-energy tensor for matter in homogeneous spacetime. In this paper we will extend this method to the more general spacetimes with a small inhomogeneity which is invariant under spatial reflection. The difficulty of mode-mixing behavior arising from the inhomogeneity of spacetime is overcome and a possible way of obtaining the WKB solution of the time-dependent mode function under the early-time approximation is presented. Our prescriptions are useful to study the back reaction of a quantized field in the early universe with a small inhomogeneity.

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