Broken covariance of particle detector models in relativistic quantum information
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevD.103.025007 http://hdl.handle.net/11449/209898 |
Resumo: | We show that the predictions of commonly used spatially smeared particle detectors coupled to quantum fields are not generally covariant outside the pointlike limit. This lack of covariance manifests itself as an ambiguity in the time-ordering operation. We analyze how the breakdown of covariance affects typical detector models in quantum field theory such as the Unruh-DeWitt model. Specifically, we show how the violations of covariance depend on the state of the detectors-field system, the shape and state of motion of the detectors, and the spacetime geometry. Furthermore, we provide the tools to explicitly evaluate the magnitude of the violation and identify the regimes where the predictions of smeared detectors are either exactly or approximately covariant in perturbative analyses, thus providing limits of validity of smeared particle detector models. |
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Repositório Institucional da UNESP |
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spelling |
Broken covariance of particle detector models in relativistic quantum informationWe show that the predictions of commonly used spatially smeared particle detectors coupled to quantum fields are not generally covariant outside the pointlike limit. This lack of covariance manifests itself as an ambiguity in the time-ordering operation. We analyze how the breakdown of covariance affects typical detector models in quantum field theory such as the Unruh-DeWitt model. Specifically, we show how the violations of covariance depend on the state of the detectors-field system, the shape and state of motion of the detectors, and the spacetime geometry. Furthermore, we provide the tools to explicitly evaluate the magnitude of the violation and identify the regimes where the predictions of smeared detectors are either exactly or approximately covariant in perturbative analyses, thus providing limits of validity of smeared particle detector models.NSERCOntario Early Researcher AwardIFT-UNESP/ICTP-SAIFRCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Government of Canada through the Department of Innovation, Science and Economic Development CanadaProvince of Ontario through the Ministry of Colleges and UniversitiesUniv Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, CanadaUniv Waterloo, Dept Appl Math, Waterloo, ON N2L 3G1, CanadaPerimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, CanadaUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, BrazilAmer Physical SocUniv WaterlooPerimeter Inst Theoret PhysUniversidade Estadual Paulista (Unesp)Martin-Martinez, EduardoPerche, T. Rick [UNESP]Torres, Bruno de S. L. [UNESP]2021-06-25T12:32:59Z2021-06-25T12:32:59Z2021-01-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article14http://dx.doi.org/10.1103/PhysRevD.103.025007Physical Review D. College Pk: Amer Physical Soc, v. 103, n. 2, 14 p., 2021.2470-0010http://hdl.handle.net/11449/20989810.1103/PhysRevD.103.025007WOS:000606970000015Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Dinfo:eu-repo/semantics/openAccess2021-10-23T19:50:05Zoai:repositorio.unesp.br:11449/209898Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:37:04.958156Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Broken covariance of particle detector models in relativistic quantum information |
title |
Broken covariance of particle detector models in relativistic quantum information |
spellingShingle |
Broken covariance of particle detector models in relativistic quantum information Martin-Martinez, Eduardo |
title_short |
Broken covariance of particle detector models in relativistic quantum information |
title_full |
Broken covariance of particle detector models in relativistic quantum information |
title_fullStr |
Broken covariance of particle detector models in relativistic quantum information |
title_full_unstemmed |
Broken covariance of particle detector models in relativistic quantum information |
title_sort |
Broken covariance of particle detector models in relativistic quantum information |
author |
Martin-Martinez, Eduardo |
author_facet |
Martin-Martinez, Eduardo Perche, T. Rick [UNESP] Torres, Bruno de S. L. [UNESP] |
author_role |
author |
author2 |
Perche, T. Rick [UNESP] Torres, Bruno de S. L. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Univ Waterloo Perimeter Inst Theoret Phys Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Martin-Martinez, Eduardo Perche, T. Rick [UNESP] Torres, Bruno de S. L. [UNESP] |
description |
We show that the predictions of commonly used spatially smeared particle detectors coupled to quantum fields are not generally covariant outside the pointlike limit. This lack of covariance manifests itself as an ambiguity in the time-ordering operation. We analyze how the breakdown of covariance affects typical detector models in quantum field theory such as the Unruh-DeWitt model. Specifically, we show how the violations of covariance depend on the state of the detectors-field system, the shape and state of motion of the detectors, and the spacetime geometry. Furthermore, we provide the tools to explicitly evaluate the magnitude of the violation and identify the regimes where the predictions of smeared detectors are either exactly or approximately covariant in perturbative analyses, thus providing limits of validity of smeared particle detector models. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T12:32:59Z 2021-06-25T12:32:59Z 2021-01-12 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevD.103.025007 Physical Review D. College Pk: Amer Physical Soc, v. 103, n. 2, 14 p., 2021. 2470-0010 http://hdl.handle.net/11449/209898 10.1103/PhysRevD.103.025007 WOS:000606970000015 |
url |
http://dx.doi.org/10.1103/PhysRevD.103.025007 http://hdl.handle.net/11449/209898 |
identifier_str_mv |
Physical Review D. College Pk: Amer Physical Soc, v. 103, n. 2, 14 p., 2021. 2470-0010 10.1103/PhysRevD.103.025007 WOS:000606970000015 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review D |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
14 |
dc.publisher.none.fl_str_mv |
Amer Physical Soc |
publisher.none.fl_str_mv |
Amer Physical Soc |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129443522150400 |