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Open AccessArticle

Magnetic Otto Engine for an Electron in a Quantum Dot: Classical and Quantum Approach

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Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110-V, 2390123 Valparaíso, Chile
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Departamento de Física, Universidad de Santiago de Chile (USACH), Avenida Ecuador 3493, 9170022 Santiago, Chile
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Centro para el Desarrollo de la Nanociencia y la Nanotecnología, 8320000 Santiago, Chile
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Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Casilla 487-3, 8370456 Santiago, Chile
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(5), 512; https://doi.org/10.3390/e21050512
Received: 7 January 2019 / Revised: 22 February 2019 / Accepted: 1 March 2019 / Published: 20 May 2019
We studied the performance of classical and quantum magnetic Otto cycle with a working substance composed of a single quantum dot using the Fock–Darwin model with the inclusion of the Zeeman interaction. Modulating an external/perpendicular magnetic field, in the classical approach, we found an oscillating behavior in the total work extracted that was not present in the quantum formulation.We found that, in the classical approach, the engine yielded a greater performance in terms of total work extracted and efficiency than when compared with the quantum approach. This is because, in the classical case, the working substance can be in thermal equilibrium at each point of the cycle, which maximizes the energy extracted in the adiabatic strokes. View Full-Text
Keywords: magnetic cycle; quantum otto cycle; quantum thermodynamics magnetic cycle; quantum otto cycle; quantum thermodynamics
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Peña, F.J.; Negrete, O.; Alvarado Barrios, G.; Zambrano, D.; González, A.; Nunez, A.S.; Orellana, P.A.; Vargas, P. Magnetic Otto Engine for an Electron in a Quantum Dot: Classical and Quantum Approach. Entropy 2019, 21, 512.

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