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| Natura: | Preprint |
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2024
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| Accesso online: | https://arxiv.org/abs/2412.10586 |
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| _version_ | 1866915063612309504 |
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| author | Pokhrel, Sagar Gea-Banacloche, Julio |
| author_facet | Pokhrel, Sagar Gea-Banacloche, Julio |
| contents | We consider a model for a quantum battery consisting of a collection of $N$ two-level atoms driven by a classical field and decaying to a common reservoir. In the extensive regime, where the energy $E$ scales as $N$ and the fluctuations $ΔE/E \to 0$, our dissipative charging protocol yields a power proportional to $N^2$, a scaling that cannot be achieved in this regime by Hamiltonian protocols. The tradeoff for this enhanced charging power is a relative inefficiency, since a large fraction of the incoming energy is lost through spontaneous emission to the environment. Nevertheless, we find the system can store a large amount of coherence, and also release the stored energy coherently through spontaneous emission, again with a power scaling as $N^2$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_10586 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Large collective power enhancement in dissipative charging of a quantum battery Pokhrel, Sagar Gea-Banacloche, Julio Quantum Physics We consider a model for a quantum battery consisting of a collection of $N$ two-level atoms driven by a classical field and decaying to a common reservoir. In the extensive regime, where the energy $E$ scales as $N$ and the fluctuations $ΔE/E \to 0$, our dissipative charging protocol yields a power proportional to $N^2$, a scaling that cannot be achieved in this regime by Hamiltonian protocols. The tradeoff for this enhanced charging power is a relative inefficiency, since a large fraction of the incoming energy is lost through spontaneous emission to the environment. Nevertheless, we find the system can store a large amount of coherence, and also release the stored energy coherently through spontaneous emission, again with a power scaling as $N^2$. |
| title | Large collective power enhancement in dissipative charging of a quantum battery |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2412.10586 |