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Efficiency Fluctuations in a Quantum Battery Charged by a Repeated Interaction Process
1Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago 8370415, Chile.
Entropy (Basel, Switzerland)
|June 24, 2022
Summary
This study introduces a quantum battery charging method using thermal systems. The process
Area of Science:
- Quantum thermodynamics
- Quantum energy storage
- Statistical mechanics
Background:
- Quantum batteries offer potential for efficient energy storage.
- Understanding charging dynamics and efficiency is crucial for practical applications.
- Auxiliary thermal systems can assist in quantum energy transfer processes.
Purpose of the Study:
- To investigate a novel charging protocol for quantum batteries.
- To analyze the role of repeated interactions and thermal systems in charging.
- To characterize the charge using ergotropy and discuss process efficiency fluctuations.
Main Methods:
- Modeling a quantum battery charging process via repeated interactions with thermal systems.
- Utilizing switching on/off of interactions to supply charging energy.
- Analyzing the charged state as an equilibrium state and defining charge via ergotropy.
Main Results:
- The quantum battery reaches an equilibrium charged state characterized by ergotropy.
- A working cycle involves ergotropy extraction and subsequent battery recharging.
- Fluctuations in process efficiency are observed, primarily influenced by the equilibrium distribution.
Conclusions:
- The proposed method provides a framework for charging quantum batteries using auxiliary thermal systems.
- Ergotropy serves as a key metric for the charged state and operational cycle.
- Efficiency fluctuations are inherent and dominated by equilibrium properties, offering insights into quantum energy transfer limitations.
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