Revisiting observables in generally covariant theories in the light of gauge fixing methods

Autor:	Pons, J. M., Salisbury, D. C., Sundermeyer, K. A.
Rok vydání:	2009
Předmět:	General Relativity and Quantum Cosmology High Energy Physics - Theory Mathematical Physics
Zdroj:	Phys.Rev.D80:084015,2009
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.80.084015
Popis:	We derive for generally covariant theories the generic dependency of observables on the original fields, corresponding to coordinate-dependent gauge fixings. This gauge choice is equivalent to a choice of intrinsically defined coordinates accomplished with the aid of spacetime scalar fields. With our approach we make full contact with, and give a new perspective to, the "evolving constants of motion" program. We are able to directly derive generic properties of observables, especially their dynamics and their Poisson algebra in terms of Dirac brackets, extending earlier results in the literature. We also give a new interpretation of the observables as limits of canonical maps. Comment: 24 pages. New paragraph in conclusions and references added. To appear in Physical Review D
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0905.4564 Zobrazit plný text záznamu View this record from Arxiv