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Trade-offs between precision and fluctuations in charging finite-dimensional quantum batteries
Pharnam Bakhshinezhad1,2,3, Beniamin R Jablonski3, Felix C Binder4
1Atominstitut, Technische Universität Wien, Stadionallee 2, 1020 Vienna, Austria.
Physical Review. E
|February 17, 2024
Summary
This study introduces optimal charging protocols for quantum batteries, focusing on precision and work fluctuations. It analyzes trade-offs for multi-component quantum systems, enhancing quantum thermodynamics applications.
Area of Science:
- Quantum Thermodynamics
- Quantum Information Science
Background:
- Quantum batteries are essential out-of-equilibrium quantum systems for work extraction and deposition.
- Modeling these batteries often involves finite-dimensional quantum systems initially in thermal equilibrium.
Purpose of the Study:
- To develop optimal or near-optimal charging protocols for quantum batteries.
- To analyze charging precision and work fluctuations in these systems.
- To investigate the performance of local versus global operations.
Main Methods:
- Considered finite-dimensional quantum systems in thermal equilibrium.
- Employed cyclic Hamiltonian processes for charging.
- Analyzed N identical two-level systems and individual d-level systems.
Main Results:
- Presented optimal/near-optimal protocols for charging quantum batteries.
- Quantified the trade-off between charging precision and work fluctuations.
- Evaluated the impact of local and global operations on battery performance.
Conclusions:
- Developed efficient charging strategies for quantum batteries.
- Provided insights into managing work fluctuations and enhancing charging precision.
- Highlighted the importance of operational strategies in quantum battery performance.
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