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Dissipative Charging of a Quantum Battery
1Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, 837.0415 Santiago, Chile.
Physical Review Letters
|July 9, 2019
Summary
Engineered quantum systems can act as thermodynamic batteries, storing energy in equilibrium states. A cyclic unitary process can then extract work from these quantum batteries, with maximal work extraction occurring at full population inversion.
Area of Science:
- Quantum Thermodynamics
- Statistical Mechanics
- Quantum Information Science
Background:
- Thermodynamic equilibrium states in engineered quantum systems can store energy.
- Quantum dissipative processes are key to preparing these energy-storing states.
- The second law of thermodynamics governs work extraction processes.
Purpose of the Study:
- To demonstrate work extraction from quantum equilibrium states.
- To investigate the role of engineered quantum dissipative processes in energy storage.
- To identify conditions for maximal work extraction and process efficiency.
Main Methods:
- Utilizing cyclic unitary processes to extract work.
- Analyzing engineered quantum dissipative processes.
- Studying systems with full population inversion for maximal work extraction.
Main Results:
- Work can be extracted from the thermodynamic equilibrium state of engineered quantum dissipative processes.
- These equilibrium states function as quantum batteries, storing energy.
- No ongoing work is required to maintain the charged state of the battery.
Conclusions:
- Engineered quantum systems offer a novel approach to energy storage and work extraction.
- The efficiency and extractable work depend on the system's state, particularly population inversion.
- This research opens avenues for quantum-enhanced energy technologies.
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