Dephasing Enabled Fast Charging of Quantum Batteries
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866917895885291520 |
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| author | Shastri, Rahul Jiang, Chao Xu, Guo-Hua Venkatesh, B. Prasanna Watanabe, Gentaro |
| author_facet | Shastri, Rahul Jiang, Chao Xu, Guo-Hua Venkatesh, B. Prasanna Watanabe, Gentaro |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16999 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dephasing Enabled Fast Charging of Quantum Batteries Shastri, Rahul Jiang, Chao Xu, Guo-Hua Venkatesh, B. Prasanna Watanabe, Gentaro Quantum Physics Statistical Mechanics 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. |
| title | Dephasing Enabled Fast Charging of Quantum Batteries |
| topic | Quantum Physics Statistical Mechanics |
| url | https://arxiv.org/abs/2402.16999 |