Records Theory

TL;DR

Records theory in quantum gravity explores how localized, information-rich subconfigurations called records can help address the problem of time by analyzing correlations within a timeless framework.

Contribution

This paper develops a foundational structure for records theory and illustrates its application using toy models across different physical systems.

Findings

Records provide a way to extract history from correlations.

Toy models demonstrate the potential of records in various contexts.

Further tools are needed for a complete formulation of records theory.

Abstract

In quantum gravity, one seeks to combine quantum mechanics and general relativity. In such attempts, one comes across the `problem of time' impasse: the notion of time is conceptually different in each of these theories. In this paper, I consider the timeless records approach toward resolving this. Records are localized, information-containing subconfigurations of a single instant. Records theory is the study of these and of how science (or history) is to be abstracted from correlations between them. I critically evaluate motivations for this approach that have previously appeared in the literature. I provide a ground-level structure for records theory and discuss what kind of further tools are needed, illustrated with some toy models: ordinary mechanics, relatonal particle dynamics, detector models and inhomogeneous perturbations about homogeneous cosmology.