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

  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},
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… 

Cosmological ultraviolet/infrared divergences and de Sitter spacetime

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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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