Analytic approximation and an improved method for computing the stress-energy of quantized scalar fields in Robertson-Walker Spacetimes
نویسندگان
چکیده
An improved method is given for the computation of the stress-energy tensor of a quantized scalar field using adiabatic regularization. The method works for fields with arbitrary mass and curvature coupling in RobertsonWalker spacetimes and is particularly useful for spacetimes with compact spatial sections. For massless fields it yields an analytic approximation for the stress-energy tensor that is similar in nature to those obtained previously for massless fields in static spacetimes. Typeset using REVTEX
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