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...
| Authors: | ; ; |
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| Format: | Article |
| Publication date: | 2016 |
| Country: | España |
| Institution: | Universidad Complutense de Madrid (UCM) |
| Repository: | Docta Complutense |
| Language: | English |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/98765.2 |
| Online Access: | https://hdl.handle.net/20.500.14352/98765.2 |
| Access Level: | Open access |
| Keyword: | 530.145 Hybrid loop quantum cosmology Inhomogeneous cosmologies Teoría de los quanta 2212 Física Teórica |
| _version_ | 1878741491256393728 |
|---|---|
| author | Elizaga Navascués, Beatriz |
| author2 | Martín Benito, Mercedes Mena Marugán, Guillermo Antonio |
| author2_role | author author |
| author_browse | Elizaga Navascués, Beatriz Martín Benito, Mercedes Mena Marugán, Guillermo Antonio |
| author_facet | Elizaga Navascués, Beatriz Martín Benito, Mercedes Mena Marugán, Guillermo Antonio |
| author_role | author |
| collection | Docta Complutense |
| 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. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_e6253cb8656d4bb37aae4e5ca6cca84b |
| institution | Universidad Complutense de Madrid (UCM) |
| instname_str | Universidad Complutense de Madrid (UCM) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:docta.ucm.es:20.500.14352/98765.2 |
| publishDate | 2016 |
| publishDateSort | 2016 |
| publisher | World Scientific Publishing |
| publisherStr | World Scientific Publishing |
| reponame_str | Docta Complutense |
| spelling | Hybrid models in loop quantum cosmology Elizaga Navascués, Beatriz Martín Benito, Mercedes Mena Marugán, Guillermo Antonio 530.145 Hybrid loop quantum cosmology Inhomogeneous cosmologies Teoría de los quanta 2212 Física Teórica 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. World Scientific Publishing https://hdl.handle.net/20.500.14352/98765.2 |
| 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 | 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_short | Hybrid models in loop quantum cosmology |
| title_sort | Hybrid models in loop quantum cosmology |
| topic | 530.145 Hybrid loop quantum cosmology Inhomogeneous cosmologies Teoría de los quanta 2212 Física Teórica |
| topic_facet | 530.145 Hybrid loop quantum cosmology Inhomogeneous cosmologies Teoría de los quanta 2212 Física Teórica |
| url | https://hdl.handle.net/20.500.14352/98765.2 |