Atenção!


O atendimento às questões referentes ao Repositório Institucional será interrompido entre os dias 20 de dezembro de 2024 a 5 de janeiro de 2025.

Pedimos a sua compreensão e aproveitamos para desejar boas festas!

 

Quantum thermodynamics aspects with a thermal reservoir based on PT -symmetric Hamiltonians

dc.contributor.authorSantos, Jonas F.G.
dc.contributor.authorLuiz, Fabricio S. [UNESP]
dc.contributor.institutionUniversidade Federal do ABC (UFABC)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-28T19:42:41Z
dc.date.available2022-04-28T19:42:41Z
dc.date.issued2021-08-01
dc.description.abstractWe present results concerning aspects of quantum thermodynamics under the background of non-Hermitian quantum mechanics for the dynamics of a quantum harmonic oscillator. Since a better control over the parameters in quantum thermodynamics processes is desired, we use concepts from collisional model to introduce a simple prototype of thermal reservoir based on PT -symmetric Hamiltonians and study its effects under the thermalization process of a single harmonic oscillator prepared in a displaced thermal state. We verify that controlling the PT -symmetric features of the reservoir allows to reverse the heat flow between system and reservoir, as well as to preserve the coherence over a longer period of time and reduce the entropy production. Furthermore, we considered a modified quantum Otto cycle in which the standard hot thermal reservoir is replaced by the thermal reservoir based on PT -symmetric Hamiltonians. By defining an effective temperature depending on the PT -symmetric parameter, it is possible to interchange the quantum Otto cycle configuration from engine to refrigerator by varying the PT -symmetric parameter. Our results indicate that PT -symmetric effects could be useful to achieve an improvement in quantum thermodynamics protocols such as coherence protection and entropy production reduction.en
dc.description.affiliationCentro de Ciências Naturais e Humanas Universidade Federal do ABC, Avenida dos Estados 5001, São Paulo
dc.description.affiliationFaculdade de Ciências Universidade Estadual Paulista, Rua Quirino de Andrade 215
dc.description.affiliationUnespFaculdade de Ciências Universidade Estadual Paulista, Rua Quirino de Andrade 215
dc.identifierhttp://dx.doi.org/10.1088/1751-8121/ac13de
dc.identifier.citationJournal of Physics A: Mathematical and Theoretical, v. 54, n. 33, 2021.
dc.identifier.doi10.1088/1751-8121/ac13de
dc.identifier.issn1751-8121
dc.identifier.issn1751-8113
dc.identifier.scopus2-s2.0-85112082170
dc.identifier.urihttp://hdl.handle.net/11449/222146
dc.language.isoeng
dc.relation.ispartofJournal of Physics A: Mathematical and Theoretical
dc.sourceScopus
dc.subjectNon-Hermitian quantum mechanics
dc.subjectPT-symmetry
dc.subjectQuantum thermodynamics
dc.titleQuantum thermodynamics aspects with a thermal reservoir based on PT -symmetric Hamiltoniansen
dc.typeArtigo
unesp.author.orcid0000-0001-9377-6526[1]

Arquivos

Coleções