Trade-offs between precision and fluctuations in charging finite-dimensional quantum batteries

• URL: http://arxiv.org/abs/2303.16676v3
• Date: Thu, 25 Jan 2024 12:34:56 GMT
• Title: Trade-offs between precision and fluctuations in charging finite-dimensional quantum batteries
• Authors: Pharnam Bakhshinezhad, Beniamin R. Jablonski, Felix C. Binder, Nicolai Friis
• Abstract summary: We consider quantum batteries initially in thermal equilibrium that are charged via cyclic Hamiltonian processes. We present optimal or near-optimal protocols for $N$ identical two-level systems and individual $d$-level systems. We analyze the trade-off between these figures of merit as well as the performance of local and global operations.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Within quantum thermodynamics, many tasks are modelled by processes that require work sources represented by out-of-equilibrium quantum systems, often dubbed quantum batteries, in which work can be deposited or from which work can be extracted. Here we consider quantum batteries modelled as finite-dimensional quantum systems initially in thermal equilibrium that are charged via cyclic Hamiltonian processes. We present optimal or near-optimal protocols for $N$ identical two-level systems and individual $d$-level systems with equally spaced energy gaps in terms of the charging precision and work fluctuations during the charging process. We analyze the trade-off between these figures of merit as well as the performance of local and global operations.

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