TL;DR
This paper discusses how fixed background fields in gravitational theories break diffeomorphism invariance, either spontaneously or explicitly, and explores the main consequences of these symmetry breakings.
Contribution
It provides a concise overview of the effects and implications of symmetry breaking in gravitational theories with fixed background fields.
Findings
Different types of symmetry breaking have distinct physical consequences.
Explicit breaking leads to different constraints compared to spontaneous breaking.
The paper summarizes key theoretical implications of background field-induced symmetry breaking.
Abstract
Gravitational theories with fixed background fields break diffeomorphism invariance. This breaking can be spontaneous or explicit. A brief summary of the main consequences of these types of breaking is presented.
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Taxonomy
TopicsCosmology and Gravitation Theories · Relativity and Gravitational Theory · Geophysics and Gravity Measurements