Geometrodynamics and Lorentz symmetry
| Autor: | Derek K. Wise |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
High Energy Physics - Theory
History General relativity Lorentz transformation FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Observer (physics) General Relativity and Quantum Cosmology Education symbols.namesake Theoretical physics High Energy Physics::Theory pacs:11.00.00 Gauge theory ddc:510 Mathematical Physics Gauge fixing Physics Spacetime pacs:04.00.00 Mathematical Physics (math-ph) Naturwissenschaftliche Fakultät Symmetry (physics) Computer Science Applications Geometrodynamics High Energy Physics - Theory (hep-th) symbols |
| Popis: | We study the dynamics of gauge theory and general relativity using fields of local observers, thus maintaining local Lorentz symmetry despite a space/time splitting of fields. We start with Yang--Mills theory, where observer fields are defined as normalized future-timelike vector fields. We then define observers without a fixed geometry, and find these play two related roles in general relativity: splitting fields into spatial and temporal parts, and "breaking" gauge symmetry, effectively reducing the spacetime SO(n,1) connection to an observer-dependent spatial SO(n) connection. In both gauge theory and gravity, the observer field reduces the action to canonical form, without using gauge fixing. In the 4d gravity case, the result is a manifestly Lorentz covariant counterpart of the Ashtekar-Barbero formulation. We also explain how this leads geometrically to a picture of general relativity in terms of "observer space" rather than spacetime---a setting where both spacetime symmetry and the dynamical description are simultaneously available. 11 pages. Submission for the proceedings of "3Quantum: Algebra, Geometry, Information", Tallinn, July 2012 |
| Databáze: | OpenAIRE |
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