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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Autores principales: Chimento, L.P., Cossarini, A.E.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_05562821_v41_n10_p3101_Chimento
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_05562821_v41_n10_p3101_Chimento2023-10-03T15:35:19Z Energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds Chimento, L.P. Cossarini, A.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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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.
format JOUR
author Chimento, L.P.
Cossarini, A.E.
spellingShingle Chimento, L.P.
Cossarini, A.E.
Energy-momentum tensor renormalization for vector fields in robertson-walker backgrounds
author_facet Chimento, L.P.
Cossarini, A.E.
author_sort Chimento, L.P.
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
url http://hdl.handle.net/20.500.12110/paper_05562821_v41_n10_p3101_Chimento
work_keys_str_mv AT chimentolp energymomentumtensorrenormalizationforvectorfieldsinrobertsonwalkerbackgrounds
AT cossariniae energymomentumtensorrenormalizationforvectorfieldsinrobertsonwalkerbackgrounds
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