Unambiguous probabilities in an eternally inflating universe

TL;DR

This paper presents a method to assign unambiguous probabilities to varying constants of nature in an eternally inflating universe, addressing previous ambiguities in cosmological probability measures.

Contribution

It introduces a novel approach for calculating probabilities of physical constants in eternal inflation without the ambiguities of earlier methods.

Findings

Provides a clear probability assignment method for constants in eternal inflation

Resolves ambiguities in previous probability measure approaches

Enables consistent predictions for observable constants

Abstract

``Constants of Nature'' and cosmological parameters may in fact be variables related to some slowly-varying fields. In models of eternal inflation, such fields will take different values in different parts of the universe. Here I show how one can assign probabilities to values of the ``constants'' measured by a typical observer. This method does not suffer from ambiguities previously discussed in the literature.