Eur. Phys. J. C (2018) 78: 596
https://doi.org/10.1140/epjc/s10052-018-6078-4

Regular Article - Theoretical Physics

Stochastic inflation with quantum and thermal noise

Institute of Theoretical Physics, University of Wroclaw, 50-204, Wrocław, Poland

^* e-mail: zhab@ift.uni.wroc.pl

Received: 28 November 2017
Accepted: 16 July 2018
Published online: 24 July 2018

Abstract

We add a thermal noise to Starobinsky equation of slow roll inflation. We calculate the number of e-folds of the stochastic system. The power spectrum and the spectral index are evaluated from the fluctuations of the e-folds using an expansion in the quantum and thermal noise terms.