How to balance quantum batteries' high power with stable energy delivery
Quantum batteries are an emerging area of research, with progress coming from theoretical studies and proof-of-principle experiments in small quantum systems. Unlike conventional chemical batteries used in everyday life, they use quantum systems to store and transfer energy. Researchers are exploring them as potential future energy sources for quantum processors and other quantum technologies.
Quantum batteries hold promise as future energy sources for advanced technologies, but balancing high power output with stable energy delivery presents a challenge. A new study reveals fundamental limits to this balance, showing that quantum mechanics prevents both energy fluctuations and power fluctuations from being made arbitrarily small simultaneously.
Researchers from the University of Oulu, VTT in Finland, IISER Mohali in India, and ICFO in Spain explored how different charging methods affect this trade-off. They found that collective charging, where all cells participate together, increases power output but also raises power fluctuations, reducing reliability. The study indicates that a charging scheme based on intermediate-range interactions could offer a useful compromise between high power and stable operation.
The findings bridge quantum fluctuations with many-body physics, offering practical charging strategies for potential quantum battery applications.
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