Stochastic wave equation with thermal noise in an expanding universe

Abstract

We discuss Einstein-Klein-Gordon system in an environment of an infinite number of scalar fields leading to an external thermal noise. In the lowest order of metric and field perturbations the quadratic fluctuations consist of a sum of quantum and thermal fluctuations. We show that these fluctuations depend on the form of the interaction of the inflaton with the environment.

published corrected version

References in corpus (3)

• Warm Inflation and its Microphysical Basis
• Perturbative Quantum Gravity Comes of Age
• Statistical physics of the inflaton decaying in an inhomogeneous random environment

Cited by in corpus (2)

• Stochastic inflaton wave equation from an expanding environment
• Power spectrum of stochastic wave and diffusion equations in the warm inflation models