Universal approach to cosmological singularities in two-dimensional dilaton gravity

We show that in a large class of two-dimensional models with conformal matter fields, the semiclassical cosmological solutions have a weak coupling singularity if the classical matter content is below a certain threshold. This threshold and the approach to the singularity are model independent. When...

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Autores principales: Martin, Gabriel Norberto, Mazzitelli, Francisco Diego
Publicado: 1994
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v50_n2_pR613_Martin
http://hdl.handle.net/20.500.12110/paper_05562821_v50_n2_pR613_Martin
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_05562821_v50_n2_pR613_Martin
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spelling paper:paper_05562821_v50_n2_pR613_Martin2023-06-08T15:42:16Z Universal approach to cosmological singularities in two-dimensional dilaton gravity Martin, Gabriel Norberto Mazzitelli, Francisco Diego We show that in a large class of two-dimensional models with conformal matter fields, the semiclassical cosmological solutions have a weak coupling singularity if the classical matter content is below a certain threshold. This threshold and the approach to the singularity are model independent. When the matter fields are not conformally invariant, the singularity persists if the quantum state is the vacuum near the singularity, and could dissappear for other quantum states. © 1994 The American Physical Society. Fil:Martin, G.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mazzitelli, F.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1994 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v50_n2_pR613_Martin http://hdl.handle.net/20.500.12110/paper_05562821_v50_n2_pR613_Martin
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We show that in a large class of two-dimensional models with conformal matter fields, the semiclassical cosmological solutions have a weak coupling singularity if the classical matter content is below a certain threshold. This threshold and the approach to the singularity are model independent. When the matter fields are not conformally invariant, the singularity persists if the quantum state is the vacuum near the singularity, and could dissappear for other quantum states. © 1994 The American Physical Society.
author Martin, Gabriel Norberto
Mazzitelli, Francisco Diego
spellingShingle Martin, Gabriel Norberto
Mazzitelli, Francisco Diego
Universal approach to cosmological singularities in two-dimensional dilaton gravity
author_facet Martin, Gabriel Norberto
Mazzitelli, Francisco Diego
author_sort Martin, Gabriel Norberto
title Universal approach to cosmological singularities in two-dimensional dilaton gravity
title_short Universal approach to cosmological singularities in two-dimensional dilaton gravity
title_full Universal approach to cosmological singularities in two-dimensional dilaton gravity
title_fullStr Universal approach to cosmological singularities in two-dimensional dilaton gravity
title_full_unstemmed Universal approach to cosmological singularities in two-dimensional dilaton gravity
title_sort universal approach to cosmological singularities in two-dimensional dilaton gravity
publishDate 1994
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v50_n2_pR613_Martin
http://hdl.handle.net/20.500.12110/paper_05562821_v50_n2_pR613_Martin
work_keys_str_mv AT martingabrielnorberto universalapproachtocosmologicalsingularitiesintwodimensionaldilatongravity
AT mazzitellifranciscodiego universalapproachtocosmologicalsingularitiesintwodimensionaldilatongravity
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