# Adiabatic regularization of the graviton stress-energy tensor in de Sitter space-time

@article{Finelli2004AdiabaticRO,
title={Adiabatic regularization of the graviton stress-energy tensor in de Sitter space-time},
author={Fabio Finelli and G. Marozzi and Gian Paolo Vacca and Giovanni Venturi},
journal={Physical Review D},
year={2004},
volume={71},
pages={023522-023522}
}
• Published 27 July 2004
• Physics
• Physical Review D
We study the renormalized energy-momentum tensor of gravitons in a de Sitter space-time. After canonically quantizing only the physical degrees of freedom, we adopt the standard adiabatic subtraction used for massless minimally coupled scalar fields as a regularization procedure and find that the energy density of gravitons in the E(3) invariant vacuum is proportional to H{sup 4}, where H is the Hubble parameter, but with a positive sign. According to this result the scalar expansion rate…
• Physics
• 2011
We consider one-loop graviton corrections to Green's scalar field functions in the de Sitter phase of an inflationary space-time, a topic relevant to the computation of cosmological observables
• Physics
• 2005
We compute the one-loop fermion self-energy for massless Dirac + Einstein in the presence of a locally de Sitter background. We employ dimensional regularization and obtain a fully renormalized
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• 2009
We calculate the fermion propagator in Friedmann–Lemaître–Robertson–Walker (FLRW) spacetimes with constant deceleration for excited states. For fermions whose mass is generated by a scalar field
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Motivated by the dark energy issue, the one-loop quantization approach for a family of relativistic cosmological theories is discussed in some detail. Specifically, general f(R) gravity at the
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• 2011
A quartic, self-interacting potential in the induced gravity framework is known to have a pure de Sitter attractor for the homogeneous mode. In order to obtain non-zero slow roll parameters we
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• 2008
We consider the one-loop effective action due to gravitons in a FLRW background with constant epsilon=-(dH/dt)/H^2. By expanding around epsilon=0 (corresponding to an expansion around de Sitter
• Physics
Physical Review D
• 2019
We study the energy-momentum tensor and helicity of gauge fields coupled through $g \phi F \tilde{F}/4$ to a pseudo-scalar field $\phi$ driving inflation. Under the assumption of a constant time
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• 2014
Motivated by issues on inflation, a generalized modified gravity model is investigated, where the model Lagrangian is described by a smooth function $f(R, K, \phi)$ of the Ricci scalar $R$, the

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