Dephasing Enabled Fast Charging of Quantum Batteries
- URL: http://arxiv.org/abs/2402.16999v1
- Date: Mon, 26 Feb 2024 20:14:48 GMT
- Title: Dephasing Enabled Fast Charging of Quantum Batteries
- Authors: Rahul Shastri, Chao Jiang, Guo-Hua Xu, B. Prasanna Venkatesh, and
Gentaro Watanabe
- Abstract summary: We propose and analyze a universal method to obtain fast charging of a quantum battery by a driven charger system using controlled, pure dephasing of the charger.
The battery displays coherent underdamped oscillations of energy for weak charger dephasing, while the quantum Zeno freezing of the charger energy at high dephasing suppresses the rate of transfer of energy to the battery.
- Score: 2.908267062452356
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We propose and analyze a universal method to obtain fast charging of a
quantum battery by a driven charger system using controlled, pure dephasing of
the charger. While the battery displays coherent underdamped oscillations of
energy for weak charger dephasing, the quantum Zeno freezing of the charger
energy at high dephasing suppresses the rate of transfer of energy to the
battery. Choosing an optimum dephasing rate between the regimes leads to a fast
charging of the battery. We illustrate our results with the charger and battery
modeled by either two-level systems or harmonic oscillators. Apart from the
fast charging, the dephasing also renders the charging performance more robust
to detuning between the charger, drive, and battery frequencies for the
two-level systems case.
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