In the abstract of [Phys. Rev. Lett. 125, 040601 (2020)] one can read that “[…] to have a nonzero rate of change of the extractable work, the state ρW of the battery cannot be an eigenstate of a ‘free energy operator,’ defined by F≡HW+β−1log(ρW), where HW is the Hamiltonian of the battery and β is the inverse temperature […].” Contrarily to what is presented below Eq. (17) of the Letter, we observe that the above conclusion does not hold when the battery is subject to nonunitary dynamics.

Comment on ``Fluctuations in Extractable Work Bound the Charging Power of Quantum Batteries'' / Cusumano, S; Rudnicki, Ł. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 127:2(2021). [10.1103/PhysRevLett.127.028901]

Comment on ``Fluctuations in Extractable Work Bound the Charging Power of Quantum Batteries''

Cusumano S;
2021

Abstract

In the abstract of [Phys. Rev. Lett. 125, 040601 (2020)] one can read that “[…] to have a nonzero rate of change of the extractable work, the state ρW of the battery cannot be an eigenstate of a ‘free energy operator,’ defined by F≡HW+β−1log(ρW), where HW is the Hamiltonian of the battery and β is the inverse temperature […].” Contrarily to what is presented below Eq. (17) of the Letter, we observe that the above conclusion does not hold when the battery is subject to nonunitary dynamics.
2021
Comment on ``Fluctuations in Extractable Work Bound the Charging Power of Quantum Batteries'' / Cusumano, S; Rudnicki, Ł. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 127:2(2021). [10.1103/PhysRevLett.127.028901]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/942797
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