Quantum field theory in curved space-time as thermo field dynamics

The strong analogy between states defined in the context of quantum field theory in curved space-time (QFT-CST) and the ones defined in the thermo field dynamics (TFD) of Takahashi and Umezawa [1] is shown. This analogy is useful in order to introduce the entropy operator in CST in the same way as i...

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Autor principal: Laciana, C.E.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00017701_v26_n4_p363_Laciana
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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_00017701_v26_n4_p363_Laciana2023-10-03T13:52:01Z Quantum field theory in curved space-time as thermo field dynamics Laciana, C.E. The strong analogy between states defined in the context of quantum field theory in curved space-time (QFT-CST) and the ones defined in the thermo field dynamics (TFD) of Takahashi and Umezawa [1] is shown. This analogy is useful in order to introduce the entropy operator in CST in the same way as in TFD. When the extremum condition in the thermodynamical potential is imposed, a family of Bogoliubov transformations that give us a planckian spectrum is found, even in "pathological" cases such as the minimally coupled scalar field. © 1994 Plenum Publishing Corporation. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00017701_v26_n4_p363_Laciana
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The strong analogy between states defined in the context of quantum field theory in curved space-time (QFT-CST) and the ones defined in the thermo field dynamics (TFD) of Takahashi and Umezawa [1] is shown. This analogy is useful in order to introduce the entropy operator in CST in the same way as in TFD. When the extremum condition in the thermodynamical potential is imposed, a family of Bogoliubov transformations that give us a planckian spectrum is found, even in "pathological" cases such as the minimally coupled scalar field. © 1994 Plenum Publishing Corporation.
format JOUR
author Laciana, C.E.
spellingShingle Laciana, C.E.
Quantum field theory in curved space-time as thermo field dynamics
author_facet Laciana, C.E.
author_sort Laciana, C.E.
title Quantum field theory in curved space-time as thermo field dynamics
title_short Quantum field theory in curved space-time as thermo field dynamics
title_full Quantum field theory in curved space-time as thermo field dynamics
title_fullStr Quantum field theory in curved space-time as thermo field dynamics
title_full_unstemmed Quantum field theory in curved space-time as thermo field dynamics
title_sort quantum field theory in curved space-time as thermo field dynamics
url http://hdl.handle.net/20.500.12110/paper_00017701_v26_n4_p363_Laciana
work_keys_str_mv AT lacianace quantumfieldtheoryincurvedspacetimeasthermofielddynamics
_version_ 1807316053593686016

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