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| Paper IPM / Physic / 18486 |
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We investigate the charging dynamics of a frequency-modulated quantum battery (QB) placed
within a dissipative cavity environment. Our study focuses on the interaction of such a battery
under both weak and strong coupling regimes, employing a model in which the quantum battery
and charger are represented as frequency-modulated qubits indirectly coupled through a zero
temperature environment. It is demonstrated that both the modulation frequency and amplitude are
crucial for optimizing the charging process and the ergotropy of the quantum battery. Specifically,
high-amplitude, low-frequency modulation significantly enhances charging performance and work
extraction in the strong coupling regime. As an intriguing result, it is deduced that modulation at very
low frequencies leads to the emergence of energy storage and work extraction in the weak coupling
regime. Such a result can never be achieved without modulation in the weak coupling regime. These
results highlight the importance of adjusting modulation parameters to optimize the performance of
quantum batteries for real-world applications in quantum technologies.
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