# 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} }

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…

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