Foundations and applications of quantum thermodynamics: coupled double quantum dots heat engines
Quantum thermodynamics is an emergent theory in physics that investigates thermodynamic properties of small systems where the quantum effects become relevant. This study relies upon the proposal of a conceptual design for a quantum thermal machine using a model of coupled double quantum dots (DQDs),...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | Brasil |
| Institución: | Universidade Federal da Paraíba (UFPB) |
| Repositorio: | Biblioteca Digital de Teses e Dissertações da UFPB |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.ufpb.br:123456789/25815 |
| Acceso en línea: | https://repositorio.ufpb.br/jspui/handle/123456789/25815 |
| Access Level: | acceso abierto |
| Palabra clave: | Termodinâmica quântica Máquinas térmicas quânticas Pontos quânticos Quantum thermodynamics Quantum Heat Machines Quantum dots Pontos quânticos duplos acoplados Pontos quânticos duplos Coupled double quantum dots Double quantum dots CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA |
| Sumario: | Quantum thermodynamics is an emergent theory in physics that investigates thermodynamic properties of small systems where the quantum effects become relevant. This study relies upon the proposal of a conceptual design for a quantum thermal machine using a model of coupled double quantum dots (DQDs), each DQD with an excess electron to interact, as the working medium. A general review on the foundations of classical and quantum thermodynamics is provided as well as the characterization of the quantum dots used in the proposed heat engine. The machine operates as an Otto engine in equilibrium conditions; our analysis shows the appearance of different regimes of operations as we adjust external parameters. These operation modes being the heater, the heat engine, or the refrigerator can also be alternated when considering the effects due to the quantum tunneling of a single electron between each quantum dot in the DQDs. |
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