2000/07/31 by P. Hájı́ček, P. Hajicek, C. Kiefer +1 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Relativity and Gravitational Theory #gr-qc #hep-th
paper · pdf · doi:10.1016/s0550-3213(01)00141-9
published as Nucl.Phys. B603 (2001) 531-554 · Latex, 26 pages, no figures; definitive version, to be published in Nuclear Physics B
arxiv created 2001/03/23 · openalex publication_date 2001/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A thin shell of light-like dust with its own gravitational field is studied in the special case of spherical symmetry. The action functional for this system due to Louko, Whiting, and Friedman is reduced to Kuchař form: the new variables are embeddings, their conjugate momenta, and Dirac observables. The concepts of background manifold and covariant gauge fixing, that underlie these variables, are reformulated in a way that implies the uniqueness and gauge invariance of the background manifold. The reduced dynamics describes motion on this background manifold.