Gravity with background fields and diffeomorphism breaking

Effective gravitational field theories with background fields break local Lorentz symmetry and diffeomorphism invariance. Examples include Chern-Simons gravity, massive gravity, and the Standard-Model Extension (SME). The physical properties and behavior of these theories depend greatly on whether t...

Full description

Saved in:
Bibliographic Details
Main Author Bluhm, Robert
Format Journal Article
LanguageEnglish
Published 03.01.2016
Subjects
Physics - General Relativity and Quantum Cosmology
Online AccessGet full text

Cover

More Information
Summary:Effective gravitational field theories with background fields break local Lorentz symmetry and diffeomorphism invariance. Examples include Chern-Simons gravity, massive gravity, and the Standard-Model Extension (SME). The physical properties and behavior of these theories depend greatly on whether the spacetime symmetry breaking is explicit or spontaneous. With explicit breaking, the background fields are fixed and nondynamical, and the resulting theories are fundamentally different from Einstein's General Relativity (GR). However, when the symmetry breaking is spontaneous, the background fields are dynamical in origin, and many of the usual features of Einstein's GR still apply.
DOI:10.48550/arxiv.1601.00331