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

摘要: We study the renormalized energy-momentum tensor of gravitons in a de Sitter space-time. After canonically quantizing only physical degrees freedom, we adopt standard adiabatic subtraction used for massless minimally coupled scalar fields as regularization procedure and find that energy density E(3) invariant vacuum is proportional to H{sup 4}, where H Hubble parameter, but with positive sign. According this result expansion rate, which gauge space-time, increased by fluctuations. This implies may then add conformally matter driving Starobinsky model inflation.