New Quantum batteries to increase quantum energy storage

H Hannan

New Quantum batteries to increase quantum energy storage
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Nonreciprocal charging boosts quantum batteries. By directing energy flow from charger to battery, this new approach greatly increases efficiency and performance gains for quantum computing logic gates.

This paper proposes and analyzes a nonreciprocal quantum battery system designed to enhance energy storage and charging efficiency. The authors model the battery and charger as quantum harmonic oscillators and introduce nonreciprocity by coupling both to a shared reservoir. By balancing coherent and dissipative interactions, they induce a unidirectional energy flow from the charger to the battery.

Compared to conventional reciprocal charging between oscillators, this nonreciprocal approach significantly boosts energy accumulation in the battery. Despite local dissipation, the nonreciprocal system demonstrates a fourfold increase in stored energy versus standard coherent charger-battery coupling. The effect persists in both underdamped and overdamped regimes, eliminating the need for precise temporal control.

The underlying mechanism relies on reservoir engineering techniques to create opportunely structured environments facilitating efficient energy transfer between system modes. The shared reservoir initiates an effective dissipative interaction between the charger and battery. Balancing this with the coherent coupling produces interference resulting in suppressed energy backflow to the charger.

This nonreciprocal quantum battery concept is scalable into a chiral network of interconnected quantum nodes for enhanced capacity. It also introduces intriguing possibilities for exploring nonreciprocal thermodynamics and energy dynamics in quantum systems. The proposed architecture is realizable with current quantum photonic or superconducting platforms.

In the broader context of expanding quantum technologies, the nonreciprocal charging approach could provide efficiency and performance gains for quantum computing logic gates and other integrated components requiring batteries. Overall this work pioneers a promising new research direction bridging nonreciprocal physics and quantum battery storage systems to tackle standing challenges in quantum information processing.

The paper: arXiv:2401.05090

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