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Collective enhancement in dissipative quantum batteries.
Javier Carrasco1, Jerónimo R Maze2,3, Carla Hermann-Avigliano1,4
1Department of Physics, Faculty of Physical and Mathematical Sciences, University of Chile, Santiago, Chile.
Physical Review. E
|July 20, 2022
Summary
We investigated a quantum battery with interacting qubits and found that collective effects enhance performance even with energy losses. Increasing battery size mitigates performance degradation from dissipation.
Area of Science:
- Quantum physics
- Quantum computing
- Energy storage
Background:
- Quantum batteries offer potential for efficient energy storage.
- Dissipation and losses are significant challenges in quantum systems.
- Understanding collective effects in quantum batteries is crucial for development.
Purpose of the Study:
- To analyze the performance of a quantum battery composed of non-mutually interacting qubits.
- To quantify charging energy, ergotropy, transfer rate, and power in a dissipative environment.
- To investigate the impact of dissipation on collective enhancements and explore mitigation strategies.
Main Methods:
- Modeling a quantum battery with N qubits coupled to a single dissipative electromagnetic field mode.
- Quantifying key performance metrics including charging energy and ergotropy.
- Analyzing the influence of dissipation and battery size on system performance.
Main Results:
- Collective enhancements in quantum batteries persist despite dissipative losses.
- Dissipation can paradoxically increase collective enhancements.
- Scaling up the quantum battery size reduces performance deterioration caused by dissipation.
Conclusions:
- Quantum batteries can maintain collective enhancements even in the presence of losses.
- Dissipation's effect on performance can be managed by increasing the number of qubits.
- Findings are relevant for experimental quantum battery realizations facing practical limitations.
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