January 11, 2024 | B. Ahmadi, P. Mazurek, P. Horodecki, S. Barzanjeh
Nonreciprocity, arising from the breaking of time-reversal symmetry, has become a fundamental tool in various quantum technology applications, enabling directional signal flow and efficient noise suppression. This paper explores the potential of nonreciprocity in optimizing the charging dynamics of a quantum battery. By introducing nonreciprocity through reservoir engineering during the charging process, the authors induce a directed energy flow from the quantum charger to the battery, resulting in a substantial increase in energy accumulation. Despite local dissipation, the nonreciprocal approach demonstrates a fourfold increase in battery energy compared to conventional charger-battery systems. The study shows that employing a shared reservoir can establish an optimal condition where nonreciprocity enhances charging efficiency and elevates energy storage in the battery. This effect is observed in the stationary limit and remains applicable even in overdamped coupling regimes, eliminating the need for precise temporal control over evolution parameters. The proposed approach is straightforward to implement using current state-of-the-art quantum circuits, both in photonics and superconducting quantum systems. The concept of nonreciprocal charging has significant implications for sensing, energy capture, and storage technologies, as well as for studying quantum thermodynamics.Nonreciprocity, arising from the breaking of time-reversal symmetry, has become a fundamental tool in various quantum technology applications, enabling directional signal flow and efficient noise suppression. This paper explores the potential of nonreciprocity in optimizing the charging dynamics of a quantum battery. By introducing nonreciprocity through reservoir engineering during the charging process, the authors induce a directed energy flow from the quantum charger to the battery, resulting in a substantial increase in energy accumulation. Despite local dissipation, the nonreciprocal approach demonstrates a fourfold increase in battery energy compared to conventional charger-battery systems. The study shows that employing a shared reservoir can establish an optimal condition where nonreciprocity enhances charging efficiency and elevates energy storage in the battery. This effect is observed in the stationary limit and remains applicable even in overdamped coupling regimes, eliminating the need for precise temporal control over evolution parameters. The proposed approach is straightforward to implement using current state-of-the-art quantum circuits, both in photonics and superconducting quantum systems. The concept of nonreciprocal charging has significant implications for sensing, energy capture, and storage technologies, as well as for studying quantum thermodynamics.