Quantum thermodynamics aspects with a thermal reservoir based on PT -symmetric Hamiltonians
dc.contributor.author | Santos, Jonas F.G. | |
dc.contributor.author | Luiz, Fabricio S. [UNESP] | |
dc.contributor.institution | Universidade Federal do ABC (UFABC) | |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | |
dc.date.accessioned | 2022-04-28T19:42:41Z | |
dc.date.available | 2022-04-28T19:42:41Z | |
dc.date.issued | 2021-08-01 | |
dc.description.abstract | We 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.affiliation | Centro de Ciências Naturais e Humanas Universidade Federal do ABC, Avenida dos Estados 5001, São Paulo | |
dc.description.affiliation | Faculdade de Ciências Universidade Estadual Paulista, Rua Quirino de Andrade 215 | |
dc.description.affiliationUnesp | Faculdade de Ciências Universidade Estadual Paulista, Rua Quirino de Andrade 215 | |
dc.identifier | http://dx.doi.org/10.1088/1751-8121/ac13de | |
dc.identifier.citation | Journal of Physics A: Mathematical and Theoretical, v. 54, n. 33, 2021. | |
dc.identifier.doi | 10.1088/1751-8121/ac13de | |
dc.identifier.issn | 1751-8121 | |
dc.identifier.issn | 1751-8113 | |
dc.identifier.scopus | 2-s2.0-85112082170 | |
dc.identifier.uri | http://hdl.handle.net/11449/222146 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Physics A: Mathematical and Theoretical | |
dc.source | Scopus | |
dc.subject | Non-Hermitian quantum mechanics | |
dc.subject | PT-symmetry | |
dc.subject | Quantum thermodynamics | |
dc.title | Quantum thermodynamics aspects with a thermal reservoir based on PT -symmetric Hamiltonians | en |
dc.type | Artigo | |
unesp.author.orcid | 0000-0001-9377-6526[1] |