Hybrid models in loop quantum cosmology

In the framework of Loop Quantum Cosmology (LQC), inhomogeneous models are usually quantized by means of a hybrid approach that combines loop quantization techniques with standard quantum field theory methods. This approach is based on a splitting of the phase space in a homogeneous sector, formed b...

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Detalles Bibliográficos
Autores: Elizaga Navascués, Beatriz, Martín Benito, Mercedes, Mena Marugán, Guillermo Antonio
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/98765.2
Acceso en línea:https://hdl.handle.net/20.500.14352/98765.2
Access Level:acceso abierto
Palabra clave:530.145
Hybrid loop quantum cosmology
Inhomogeneous cosmologies
Teoría de los quanta
2212 Física Teórica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/98765.2
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repository_id_str
spelling Hybrid models in loop quantum cosmologyElizaga Navascués, BeatrizMartín Benito, MercedesMena Marugán, Guillermo Antonio530.145Hybrid loop quantum cosmologyInhomogeneous cosmologiesTeoría de los quanta2212 Física TeóricaIn the framework of Loop Quantum Cosmology (LQC), inhomogeneous models are usually quantized by means of a hybrid approach that combines loop quantization techniques with standard quantum field theory methods. This approach is based on a splitting of the phase space in a homogeneous sector, formed by global, zero-modes and an inhomogeneous sector, formed by the remaining, infinite number of modes, that describe the local degrees of freedom. Then, the hybrid quantization is attained by adopting a loop representation for the homogeneous gravitational sector, while a Fock representation is used for the inhomogeneities. The zero-mode of the Hamiltonian constraint operator couples the homogeneous and inhomogeneous sectors. The hybrid approach, therefore, is expected to provide a suitable quantum theory in regimes where the main quantum effects of the geometry are those affecting the zero-modes, while the inhomogeneities, still being quantum, can be treated in a more conventional way. This hybrid strategy was first proposed for the simplest cosmological midisuperspaces: the Gowdy models, and it has been later applied to the case of cosmological perturbations. This paper reviews the construction and main applications of hybrid LQC.World Scientific PublishingUniversidad Complutense de Madrid20162016-01-0120162016-01-01journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/98765.2reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)InglésengMinisterio de Ciencia e Innovación http://dx.doi.org/10.13039/501100004837 FIS2011-30145-C03-02 Not availableMinisterio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 FIS2014-54800-C2-2-P Not availableopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/98765.22026-06-02T12:44:21Z
dc.title.none.fl_str_mv Hybrid models in loop quantum cosmology
title Hybrid models in loop quantum cosmology
spellingShingle Hybrid models in loop quantum cosmology
Elizaga Navascués, Beatriz
530.145
Hybrid loop quantum cosmology
Inhomogeneous cosmologies
Teoría de los quanta
2212 Física Teórica
title_short Hybrid models in loop quantum cosmology
title_full Hybrid models in loop quantum cosmology
title_fullStr Hybrid models in loop quantum cosmology
title_full_unstemmed Hybrid models in loop quantum cosmology
title_sort Hybrid models in loop quantum cosmology
dc.creator.none.fl_str_mv Elizaga Navascués, Beatriz
Martín Benito, Mercedes
Mena Marugán, Guillermo Antonio
author Elizaga Navascués, Beatriz
author_facet Elizaga Navascués, Beatriz
Martín Benito, Mercedes
Mena Marugán, Guillermo Antonio
author_role author
author2 Martín Benito, Mercedes
Mena Marugán, Guillermo Antonio
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 530.145
Hybrid loop quantum cosmology
Inhomogeneous cosmologies
Teoría de los quanta
2212 Física Teórica
topic 530.145
Hybrid loop quantum cosmology
Inhomogeneous cosmologies
Teoría de los quanta
2212 Física Teórica
description In the framework of Loop Quantum Cosmology (LQC), inhomogeneous models are usually quantized by means of a hybrid approach that combines loop quantization techniques with standard quantum field theory methods. This approach is based on a splitting of the phase space in a homogeneous sector, formed by global, zero-modes and an inhomogeneous sector, formed by the remaining, infinite number of modes, that describe the local degrees of freedom. Then, the hybrid quantization is attained by adopting a loop representation for the homogeneous gravitational sector, while a Fock representation is used for the inhomogeneities. The zero-mode of the Hamiltonian constraint operator couples the homogeneous and inhomogeneous sectors. The hybrid approach, therefore, is expected to provide a suitable quantum theory in regimes where the main quantum effects of the geometry are those affecting the zero-modes, while the inhomogeneities, still being quantum, can be treated in a more conventional way. This hybrid strategy was first proposed for the simplest cosmological midisuperspaces: the Gowdy models, and it has been later applied to the case of cosmological perturbations. This paper reviews the construction and main applications of hybrid LQC.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-01-01
2016
2016-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/98765.2
url https://hdl.handle.net/20.500.14352/98765.2
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Ciencia e Innovación http://dx.doi.org/10.13039/501100004837 FIS2011-30145-C03-02 Not available
Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 FIS2014-54800-C2-2-P Not available
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv World Scientific Publishing
publisher.none.fl_str_mv World Scientific Publishing
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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