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- W3104802080 abstract "The treatment of a quantized field in a curved spacetime requires the study of backreaction of the field on the spacetime via the semiclassical Einstein equation. We consider a free scalar field in spatially flat Robertson–Walker spacetime. We require the state of the field to allow for a renormalized semiclassical stress tensor. We calculate the singularities of the stress tensor restricted to equal times in agreement with the usual renormalization prescription for Hadamard states to perform an explicit renormalization. The dynamical system for the Robertson–Walker scale parameter a(t) coupled to the scalar field is finally derived for the case of conformal and also general coupling." @default.
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- W3104802080 date "2011-06-01" @default.
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- W3104802080 title "DYNAMICAL BACKREACTION IN ROBERTSON–WALKER SPACETIME" @default.
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- W3104802080 doi "https://doi.org/10.1142/s0129055x11004357" @default.
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