Thermal Effects in Ising Cosmology

Abstract

We consider a real scalar field in de Sitter background and compute its thermal propagators. We propose that in a dS/CFT context, nontrivial thermal effects as seen by an ‘out’ observer can be encoded in the anomalous dimensions of the d=3 Ising model. One of these anomalous dimensions, the critical exponent η, completely fixes a number of cosmological observables, which we compute.

Keywords

• field theory
• thermal field theory
• cosmology
• de Sitter space