Charging efficiency bursts in a quantum battery with cyclic indefinite causal order

• URL: http://arxiv.org/abs/2603.22761v1
• Date: Tue, 24 Mar 2026 03:44:55 GMT
• Title: Charging efficiency bursts in a quantum battery with cyclic indefinite causal order
• Abstract summary: We propose a new charging protocol that utilizes cyclic indefinite causal order.<n>We observe charging efficiency bursts when implementing our cyclic indefinite charging protocol.<n>The results validate the existence of charging efficiency bursts as shown in our theoretical analysis and numerical simulations.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Enhancement of quantum battery performance is a popular subject in quantum thermodynamics. An interesting phenomenon is the quick charging effect [Phys. Rev. Res. 6, 023136 (2024)], which has been explored by utilizing a quantum interferometric technique known as superposition of trajectories. A similar technique used to boost quantum battery performance is indefinite causal order. Here, we propose a new charging protocol that utilizes cyclic indefinite causal order, whereby $N$ charging sequences are superposed when utilizing $N$ chargers. We observe charging efficiency bursts when implementing our cyclic indefinite charging protocol. The duration of these bursts increase with $N$. Additionally, we present a circuit model to implement our charging protocol for the two-charger scenario and perform proof-of-concept demonstrations on IonQ, Quantinuum and IBMQ quantum processors. The results validate the existence of charging efficiency bursts as shown by our theoretical analysis and numerical simulations.

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