PIRSA:10100082

Effects of decoherence on IR divergence

Takahiro, T. (2010). Effects of decoherence on IR divergence. Perimeter Institute. https://pirsa.org/10100082

Takahiro, Tanaka. Effects of decoherence on IR divergence. Perimeter Institute, Oct. 30, 2010, https://pirsa.org/10100082 

          @misc{ pirsa_PIRSA:10100082,
            doi = {10.48660/10100082},
            url = {https://pirsa.org/10100082},
            author = {Takahiro, Tanaka},
            keywords = {Cosmology},
            language = {en},
            title = {Effects of decoherence on IR divergence},
            publisher = {Perimeter Institute},
            year = {2010},
            month = {oct},
            note = {PIRSA:10100082 see, \url{https://pirsa.org}}
          }

Tanaka Takahiro

Talk numberPIRSA:10100082
DOI10.48660/10100082
Collection
Talk Type Conference
Subject

Abstract

We propose one way to regularize the fluctuations generated during inflation. We show that, as long as we consider the case that the non-linear interaction acts for a finite duration, observable fluctuations are free from IR divergences not only in the single field models but also in the multi field model. In contrast to the single field model, to discuss observables, we need to take into account the effects of quantum decoherence which pick up a unique history of the universe from various possibilities contained in initial quantum state set naturally in the early stage of the universe.