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Quantum Mechanical Engine for the Quantum Rabi Model

Departamento de Física, Universidad de Santiago de Chile (USACH), Avenida Ecuador 3493, Santiago 9170124, Chile
Departamento de Física, Universidad Técnica Federico Santa María Casilla 110V, Valparaíso 2340000, Chile
Center for the Development of Nanoscience and Nanotechnology, Estación Central, Santiago 9170124, Chile
Author to whom correspondence should be addressed.
Entropy 2018, 20(10), 767;
Received: 17 August 2018 / Revised: 28 September 2018 / Accepted: 5 October 2018 / Published: 7 October 2018
(This article belongs to the Section Quantum Information)
We consider a purely mechanical quantum cycle comprised of adiabatic and isoenergetic processes. In the latter, the system interacts with an energy bath keeping constant the expectation value of the Hamiltonian. In this work, we study the performance of the quantum cycle for a system described by the quantum Rabi model for the case of controlling the coupling strength parameter, the resonator frequency, and the two-level system frequency. For the cases of controlling either the coupling strength parameter or the resonator frequency, we find that it is possible to closely approach to maximal unit efficiency when the parameter is sufficiently increased in the first adiabatic stage. In addition, for the first two cases the maximal work extracted is obtained at parameter values corresponding to high efficiency, which constitutes an improvement over current proposals of this cycle. View Full-Text
Keywords: quantum thermodynamics; quantum Rabi model; isoenergetic cycle quantum thermodynamics; quantum Rabi model; isoenergetic cycle
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Alvarado Barrios, G.; Peña, F.J.; Albarrán-Arriagada, F.; Vargas, P.; Retamal, J.C. Quantum Mechanical Engine for the Quantum Rabi Model. Entropy 2018, 20, 767.

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