Growing classical and quantum entropies in the early universe

Following the idea that the global and local arrow of time has a cosmological origin, we define an entropy in the classical and in the quantum periods of the universe evolution. For the quantum period a semi-classical approach is adopted, modelling the universe with Wheeler-De Witt equation and usin...

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Guardado en:
Detalles Bibliográficos
Publicado: 2010
Materias:
Decoherence
Entropy
Quantum universe
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00207748_v49_n1_p171_Ardenghi
http://hdl.handle.net/20.500.12110/paper_00207748_v49_n1_p171_Ardenghi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00207748_v49_n1_p171_Ardenghi
record_format dspace
spelling paper:paper_00207748_v49_n1_p171_Ardenghi2023-06-08T14:41:57Z Growing classical and quantum entropies in the early universe Decoherence Entropy Quantum universe Following the idea that the global and local arrow of time has a cosmological origin, we define an entropy in the classical and in the quantum periods of the universe evolution. For the quantum period a semi-classical approach is adopted, modelling the universe with Wheeler-De Witt equation and using WKB. By applying the self-induced decoherence to the state of the universe it is proved that the quantum universe becomes a classical one. This allows us to define a conditional entropy which, in our simplified model, is proportional to e2γt where γ is the dumping factor associated with the interaction potential of the scalar fields. Finally we find both Gibbs and thermodynamical entropy of the universe based in the conditional entropy. © Springer Science+Business Media, LLC 2009. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00207748_v49_n1_p171_Ardenghi http://hdl.handle.net/20.500.12110/paper_00207748_v49_n1_p171_Ardenghi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Decoherence
Entropy
Quantum universe
spellingShingle Decoherence
Entropy
Quantum universe
Growing classical and quantum entropies in the early universe
topic_facet Decoherence
Entropy
Quantum universe
description Following the idea that the global and local arrow of time has a cosmological origin, we define an entropy in the classical and in the quantum periods of the universe evolution. For the quantum period a semi-classical approach is adopted, modelling the universe with Wheeler-De Witt equation and using WKB. By applying the self-induced decoherence to the state of the universe it is proved that the quantum universe becomes a classical one. This allows us to define a conditional entropy which, in our simplified model, is proportional to e2γt where γ is the dumping factor associated with the interaction potential of the scalar fields. Finally we find both Gibbs and thermodynamical entropy of the universe based in the conditional entropy. © Springer Science+Business Media, LLC 2009.
title Growing classical and quantum entropies in the early universe
title_short Growing classical and quantum entropies in the early universe
title_full Growing classical and quantum entropies in the early universe
title_fullStr Growing classical and quantum entropies in the early universe
title_full_unstemmed Growing classical and quantum entropies in the early universe
title_sort growing classical and quantum entropies in the early universe
publishDate 2010
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00207748_v49_n1_p171_Ardenghi
http://hdl.handle.net/20.500.12110/paper_00207748_v49_n1_p171_Ardenghi
_version_ 1768545218844426240

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