A New Theory of Stochastic Inflation

TL;DR

This paper introduces a new theory of stochastic inflation that resolves existing criticisms, addresses the quantum-to-classical transition, and reduces fine-tuning issues in inflation models.

Contribution

It presents a novel formulation of stochastic inflation that overcomes previous theoretical problems and simplifies the conditions needed for successful inflation.

Findings

Addresses quantum-to-classical transition problem

Eases fine-tuning constraints in inflation models

Provides a consistent alternative to conventional stochastic inflation

Abstract

The stochastic inflation program is a framework for understanding the dynamics of a quantum scalar field driving an inflationary phase. Though widely used and accepted, there have over recent years been serious criticisms of this theory. In this paper I will present a new theory of stochastic inflation which avoids the problems of the conventional approach. Specifically, the theory can address the quantum-to-classical transition problem, and it will be shown to lead to a dramatic easing of the fine tuning constraints that have plagued inflation theories.