Characterization of a Two-Photon Quantum Battery: Initial Conditions, Stability and Work Extraction
1
Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
2
SPIN-CNR, Via Dodecaneso 33, 16146 Genova, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Andrei Khrennikov
Entropy 2021, 23(5), 612; https://doi.org/10.3390/e23050612
Received: 7 April 2021
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Revised: 2 May 2021
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Accepted: 12 May 2021
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Published: 14 May 2021
(This article belongs to the Special Issue Non-equilibrium Thermodynamics in the Quantum Regime)
We consider a quantum battery that is based on a two-level system coupled with a cavity radiation by means of a two-photon interaction. Various figures of merit, such as stored energy, average charging power, energy fluctuations, and extractable work are investigated, considering, as possible initial conditions for the cavity, a Fock state, a coherent state, and a squeezed state. We show that the first state leads to better performances for the battery. However, a coherent state with the same average number of photons, even if it is affected by stronger fluctuations in the stored energy, results in quite interesting performance, in particular since it allows for almost completely extracting the stored energy as usable work at short enough times.
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Keywords:
quantum battery; two-photon Jaynes-Cummings model
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MDPI and ACS Style
Delmonte, A.; Crescente, A.; Carrega, M.; Ferraro, D.; Sassetti, M. Characterization of a Two-Photon Quantum Battery: Initial Conditions, Stability and Work Extraction. Entropy 2021, 23, 612. https://doi.org/10.3390/e23050612
AMA Style
Delmonte A, Crescente A, Carrega M, Ferraro D, Sassetti M. Characterization of a Two-Photon Quantum Battery: Initial Conditions, Stability and Work Extraction. Entropy. 2021; 23(5):612. https://doi.org/10.3390/e23050612
Chicago/Turabian StyleDelmonte, Anna, Alba Crescente, Matteo Carrega, Dario Ferraro, and Maura Sassetti. 2021. "Characterization of a Two-Photon Quantum Battery: Initial Conditions, Stability and Work Extraction" Entropy 23, no. 5: 612. https://doi.org/10.3390/e23050612
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