Fluctuations of a massive scalar field: temperature and boundary

Detalhes bibliográficos
Ano de defesa: 2020
Autor(a) principal: FERREIRA JUNIOR, Alexsandre Leite lattes
Orientador(a): DE LORENCI, Vitorio Alberto lattes
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: eng
Instituição de defesa: Universidade Federal de Itajubá
Programa de Pós-Graduação: Programa de Pós-Graduação: Mestrado - Física
Departamento: IFQ - Instituto de Física e Química
País: Brasil
Palavras-chave em Português:
Boundary quantum field theory
Stochastic motion
Massive scalar field
Área do conhecimento CNPq:
CNPQ::CIÊNCIAS EXATAS E DA TERRA::FÍSICA
Link de acesso: https://repositorio.unifei.edu.br/jspui/handle/123456789/2358
Resumo: Agência 1
id UFEI_71cd9ac6ee278327da270d45e25ff84b
oai_identifier_str oai:repositorio.unifei.edu.br:123456789/2358
network_acronym_str UFEI
network_name_str Repositório Institucional da UNIFEI (RIUNIFEI)
repository_id_str
spelling 2020-08-312021-03-252021-03-25T14:48:06Z2021-03-25T14:48:06Zhttps://repositorio.unifei.edu.br/jspui/handle/123456789/2358Agência 1It is well established that a change in the physical state of a quantum field induces dispersions on the velocity of a interacting non-relativistic test particle. Here such a interacting model is addressed with a finite transition time between states of the field. Underlining that such induced stochastic motion is different from an usual Brownian motion, as, at late times, the dispersions are bounded and do not depend on the interaction time, without the need for a dissipative force. Further, we study the case for a massive scalar field at finite temperatures, thus generalizing previous investigation in [1]. The results presented here show subvacuum effects even at finite temperature. Nonetheless, novel effects are also unveiled, as a detailed description of the thermal contribution highlights their discrepancy to the usual Brownian motion and stresses the opposing character of mass and temperature. The presence of the field mass weakens thermal contributions and temperature hides the characteristic oscillatory pattern of massive fields. Such interplay is even more relevant in the presence of a boundary, when investigating the distance behavior of the dispersions and the vacuum versus thermal dominance near the wall. As for higher masses the vacuum term dominates for larger distances, being able also to create and interchange in such dominance as the wall is approachedengUniversidade Federal de ItajubáPrograma de Pós-Graduação: Mestrado - FísicaUNIFEIBrasilIFQ - Instituto de Física e QuímicaCNPQ::CIÊNCIAS EXATAS E DA TERRA::FÍSICABoundary quantum field theoryStochastic motionMassive scalar fieldFluctuations of a massive scalar field: temperature and boundaryinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisDE LORENCI, Vitorio Albertohttp://lattes.cnpq.br/1361400129993392http://lattes.cnpq.br/0375563373339784FERREIRA JUNIOR, Alexsandre LeiteFERREIRA JUNIOR, Alexsandre Leite. Fluctuations of a massive scalar field: temperature and boundary. 2020. 70 f. Dissertação (Mestrado em Física) – Universidade Federal de Itajubá, Itajubá, 2020.info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFEI (RIUNIFEI)instname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEILICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://repositorio.unifei.edu.br/jspui/bitstream/123456789/2358/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52ORIGINALDissertação_2021078.pdfDissertação_2021078.pdfapplication/pdf1630979https://repositorio.unifei.edu.br/jspui/bitstream/123456789/2358/1/Disserta%c3%a7%c3%a3o_2021078.pdf3f9619398bbc2cd18571e78c8eaee43cMD51123456789/23582021-03-25 11:50:01.751oai:repositorio.unifei.edu.br:123456789/2358Tk9URTogUExBQ0UgWU9VUiBPV04gTElDRU5TRSBIRVJFClRoaXMgc2FtcGxlIGxpY2Vuc2UgaXMgcHJvdmlkZWQgZm9yIGluZm9ybWF0aW9uYWwgcHVycG9zZXMgb25seS4KCk5PTi1FWENMVVNJVkUgRElTVFJJQlVUSU9OIExJQ0VOU0UKCkJ5IHNpZ25pbmcgYW5kIHN1Ym1pdHRpbmcgdGhpcyBsaWNlbnNlLCB5b3UgKHRoZSBhdXRob3Iocykgb3IgY29weXJpZ2h0Cm93bmVyKSBncmFudHMgdG8gRFNwYWNlIFVuaXZlcnNpdHkgKERTVSkgdGhlIG5vbi1leGNsdXNpdmUgcmlnaHQgdG8gcmVwcm9kdWNlLAp0cmFuc2xhdGUgKGFzIGRlZmluZWQgYmVsb3cpLCBhbmQvb3IgZGlzdHJpYnV0ZSB5b3VyIHN1Ym1pc3Npb24gKGluY2x1ZGluZwp0aGUgYWJzdHJhY3QpIHdvcmxkd2lkZSBpbiBwcmludCBhbmQgZWxlY3Ryb25pYyBmb3JtYXQgYW5kIGluIGFueSBtZWRpdW0sCmluY2x1ZGluZyBidXQgbm90IGxpbWl0ZWQgdG8gYXVkaW8gb3IgdmlkZW8uCgpZb3UgYWdyZWUgdGhhdCBEU1UgbWF5LCB3aXRob3V0IGNoYW5naW5nIHRoZSBjb250ZW50LCB0cmFuc2xhdGUgdGhlCnN1Ym1pc3Npb24gdG8gYW55IG1lZGl1bSBvciBmb3JtYXQgZm9yIHRoZSBwdXJwb3NlIG9mIHByZXNlcnZhdGlvbi4KCllvdSBhbHNvIGFncmVlIHRoYXQgRFNVIG1heSBrZWVwIG1vcmUgdGhhbiBvbmUgY29weSBvZiB0aGlzIHN1Ym1pc3Npb24gZm9yCnB1cnBvc2VzIG9mIHNlY3VyaXR5LCBiYWNrLXVwIGFuZCBwcmVzZXJ2YXRpb24uCgpZb3UgcmVwcmVzZW50IHRoYXQgdGhlIHN1Ym1pc3Npb24gaXMgeW91ciBvcmlnaW5hbCB3b3JrLCBhbmQgdGhhdCB5b3UgaGF2ZQp0aGUgcmlnaHQgdG8gZ3JhbnQgdGhlIHJpZ2h0cyBjb250YWluZWQgaW4gdGhpcyBsaWNlbnNlLiBZb3UgYWxzbyByZXByZXNlbnQKdGhhdCB5b3VyIHN1Ym1pc3Npb24gZG9lcyBub3QsIHRvIHRoZSBiZXN0IG9mIHlvdXIga25vd2xlZGdlLCBpbmZyaW5nZSB1cG9uCmFueW9uZSdzIGNvcHlyaWdodC4KCklmIHRoZSBzdWJtaXNzaW9uIGNvbnRhaW5zIG1hdGVyaWFsIGZvciB3aGljaCB5b3UgZG8gbm90IGhvbGQgY29weXJpZ2h0LAp5b3UgcmVwcmVzZW50IHRoYXQgeW91IGhhdmUgb2J0YWluZWQgdGhlIHVucmVzdHJpY3RlZCBwZXJtaXNzaW9uIG9mIHRoZQpjb3B5cmlnaHQgb3duZXIgdG8gZ3JhbnQgRFNVIHRoZSByaWdodHMgcmVxdWlyZWQgYnkgdGhpcyBsaWNlbnNlLCBhbmQgdGhhdApzdWNoIHRoaXJkLXBhcnR5IG93bmVkIG1hdGVyaWFsIGlzIGNsZWFybHkgaWRlbnRpZmllZCBhbmQgYWNrbm93bGVkZ2VkCndpdGhpbiB0aGUgdGV4dCBvciBjb250ZW50IG9mIHRoZSBzdWJtaXNzaW9uLgoKSUYgVEhFIFNVQk1JU1NJT04gSVMgQkFTRUQgVVBPTiBXT1JLIFRIQVQgSEFTIEJFRU4gU1BPTlNPUkVEIE9SIFNVUFBPUlRFRApCWSBBTiBBR0VOQ1kgT1IgT1JHQU5JWkFUSU9OIE9USEVSIFRIQU4gRFNVLCBZT1UgUkVQUkVTRU5UIFRIQVQgWU9VIEhBVkUKRlVMRklMTEVEIEFOWSBSSUdIVCBPRiBSRVZJRVcgT1IgT1RIRVIgT0JMSUdBVElPTlMgUkVRVUlSRUQgQlkgU1VDSApDT05UUkFDVCBPUiBBR1JFRU1FTlQuCgpEU1Ugd2lsbCBjbGVhcmx5IGlkZW50aWZ5IHlvdXIgbmFtZShzKSBhcyB0aGUgYXV0aG9yKHMpIG9yIG93bmVyKHMpIG9mIHRoZQpzdWJtaXNzaW9uLCBhbmQgd2lsbCBub3QgbWFrZSBhbnkgYWx0ZXJhdGlvbiwgb3RoZXIgdGhhbiBhcyBhbGxvd2VkIGJ5IHRoaXMKbGljZW5zZSwgdG8geW91ciBzdWJtaXNzaW9uLgo=Repositório InstitucionalPUBhttps://repositorio.unifei.edu.br/oai/requestrepositorio@unifei.edu.br || geraldocarlos@unifei.edu.bropendoar:70442021-03-25T14:50:01Repositório Institucional da UNIFEI (RIUNIFEI) - Universidade Federal de Itajubá (UNIFEI)false
dc.title.pt_BR.fl_str_mv Fluctuations of a massive scalar field: temperature and boundary
title Fluctuations of a massive scalar field: temperature and boundary
spellingShingle Fluctuations of a massive scalar field: temperature and boundary
FERREIRA JUNIOR, Alexsandre Leite
CNPQ::CIÊNCIAS EXATAS E DA TERRA::FÍSICA
Boundary quantum field theory
Stochastic motion
Massive scalar field
title_short Fluctuations of a massive scalar field: temperature and boundary
title_full Fluctuations of a massive scalar field: temperature and boundary
title_fullStr Fluctuations of a massive scalar field: temperature and boundary
title_full_unstemmed Fluctuations of a massive scalar field: temperature and boundary
title_sort Fluctuations of a massive scalar field: temperature and boundary
author FERREIRA JUNIOR, Alexsandre Leite
author_facet FERREIRA JUNIOR, Alexsandre Leite
author_role author
dc.contributor.advisor1.fl_str_mv DE LORENCI, Vitorio Alberto
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/1361400129993392
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/0375563373339784
dc.contributor.author.fl_str_mv FERREIRA JUNIOR, Alexsandre Leite
contributor_str_mv DE LORENCI, Vitorio Alberto
dc.subject.cnpq.fl_str_mv CNPQ::CIÊNCIAS EXATAS E DA TERRA::FÍSICA
topic CNPQ::CIÊNCIAS EXATAS E DA TERRA::FÍSICA
Boundary quantum field theory
Stochastic motion
Massive scalar field
dc.subject.por.fl_str_mv Boundary quantum field theory
Stochastic motion
Massive scalar field
description Agência 1
publishDate 2020
dc.date.issued.fl_str_mv 2020-08-31
dc.date.available.fl_str_mv 2021-03-25
2021-03-25T14:48:06Z
dc.date.accessioned.fl_str_mv 2021-03-25T14:48:06Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://repositorio.unifei.edu.br/jspui/handle/123456789/2358
url https://repositorio.unifei.edu.br/jspui/handle/123456789/2358
dc.language.iso.fl_str_mv eng
language eng
dc.relation.references.pt_BR.fl_str_mv FERREIRA JUNIOR, Alexsandre Leite. Fluctuations of a massive scalar field: temperature and boundary. 2020. 70 f. Dissertação (Mestrado em Física) – Universidade Federal de Itajubá, Itajubá, 2020.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Universidade Federal de Itajubá
dc.publisher.program.fl_str_mv Programa de Pós-Graduação: Mestrado - Física
dc.publisher.initials.fl_str_mv UNIFEI
dc.publisher.country.fl_str_mv Brasil
dc.publisher.department.fl_str_mv IFQ - Instituto de Física e Química
publisher.none.fl_str_mv Universidade Federal de Itajubá
dc.source.none.fl_str_mv reponame:Repositório Institucional da UNIFEI (RIUNIFEI)
instname:Universidade Federal de Itajubá (UNIFEI)
instacron:UNIFEI
instname_str Universidade Federal de Itajubá (UNIFEI)
instacron_str UNIFEI
institution UNIFEI
reponame_str Repositório Institucional da UNIFEI (RIUNIFEI)
collection Repositório Institucional da UNIFEI (RIUNIFEI)
bitstream.url.fl_str_mv https://repositorio.unifei.edu.br/jspui/bitstream/123456789/2358/2/license.txt
https://repositorio.unifei.edu.br/jspui/bitstream/123456789/2358/1/Disserta%c3%a7%c3%a3o_2021078.pdf
bitstream.checksum.fl_str_mv 8a4605be74aa9ea9d79846c1fba20a33
3f9619398bbc2cd18571e78c8eaee43c
bitstream.checksumAlgorithm.fl_str_mv MD5
MD5
repository.name.fl_str_mv Repositório Institucional da UNIFEI (RIUNIFEI) - Universidade Federal de Itajubá (UNIFEI)
repository.mail.fl_str_mv repositorio@unifei.edu.br || geraldocarlos@unifei.edu.br
_version_ 1797312003941859328

Registros relacionados