Energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds
In this paper we generalize the Stueckelberg formalism of flat spacetime to describe vector fields propagating in a Robertson-Walker spatially flat background. In the zero-mass limit of the regularized energy-momentum tensor we recover the usual vacuum-polarization terms of the massless Maxwell theo...
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1990
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paper:paper_05562821_v41_n10_p3101_Chimento2023-06-08T15:42:07Z Energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds Chimento, Luis Pascual Cossarini, Adriana E. In this paper we generalize the Stueckelberg formalism of flat spacetime to describe vector fields propagating in a Robertson-Walker spatially flat background. In the zero-mass limit of the regularized energy-momentum tensor we recover the usual vacuum-polarization terms of the massless Maxwell theory. Further on we investigate particle creation and the renormalizability of the energy-momentum tensor expectation value in the vacuum state which minimizes the metric Hamiltonian. In the massive case we found that the last one corresponds to that obtained through the Higgs mechanism and that it is not renormalizable in general. In the massless case we found that both quantities are finite and are in agreement with those in the literature obtained by different regularization methods, the resulting vacuum being the standard conformal one. © 1990 The American Physical Society. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cossarini, A.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1990 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v41_n10_p3101_Chimento http://hdl.handle.net/20.500.12110/paper_05562821_v41_n10_p3101_Chimento |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
description |
In this paper we generalize the Stueckelberg formalism of flat spacetime to describe vector fields propagating in a Robertson-Walker spatially flat background. In the zero-mass limit of the regularized energy-momentum tensor we recover the usual vacuum-polarization terms of the massless Maxwell theory. Further on we investigate particle creation and the renormalizability of the energy-momentum tensor expectation value in the vacuum state which minimizes the metric Hamiltonian. In the massive case we found that the last one corresponds to that obtained through the Higgs mechanism and that it is not renormalizable in general. In the massless case we found that both quantities are finite and are in agreement with those in the literature obtained by different regularization methods, the resulting vacuum being the standard conformal one. © 1990 The American Physical Society. |
author |
Chimento, Luis Pascual Cossarini, Adriana E. |
spellingShingle |
Chimento, Luis Pascual Cossarini, Adriana E. Energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds |
author_facet |
Chimento, Luis Pascual Cossarini, Adriana E. |
author_sort |
Chimento, Luis Pascual |
title |
Energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds |
title_short |
Energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds |
title_full |
Energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds |
title_fullStr |
Energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds |
title_full_unstemmed |
Energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds |
title_sort |
energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds |
publishDate |
1990 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v41_n10_p3101_Chimento http://hdl.handle.net/20.500.12110/paper_05562821_v41_n10_p3101_Chimento |
work_keys_str_mv |
AT chimentoluispascual energymomentumtensorrenormalizationforvectorfieldsinrobertsonwalkerbackgrounds AT cossariniadrianae energymomentumtensorrenormalizationforvectorfieldsinrobertsonwalkerbackgrounds |
_version_ |
1768545560469438464 |