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arXiv · 2606.24456

Interaction-Enhanced Ergotropy in Phase-Driven Andreev Bound State Quantum Batteries

Disha Verma·B. Vigneshwar·R. Sankaranarayanan
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Abstract

We investigate a phase-driven quantum battery composed of two interacting Andreev bound state (ABS) units, providing a minimal superconducting platform for coherent energy storage. By analyzing the ergotropy dynamics under a superconducting phase ramp, we show that the interplay between avoided-crossing excitation and interaction-induced hybridization strongly modifies the charging process. In the high-transparency regime relevant for graphene SNS junctions, the interaction enhances the stored extractable work and generates pronounced oscillatory charging dynamics associated with coherent redistribution between coupled ABS sectors. The phase-resolved evolution further reveals optimal charging windows during the Josephson cycle, indicating the possibility of phase-programmable energy extraction through partial-cycle operation. Overall, our results identify interaction-assisted avoided-crossing dynamics as a microscopic mechanism for controllable energy storage in superconducting quantum batteries.

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Disha Verma, B. Vigneshwar, R. Sankaranarayanan. 2026-06-25. Interaction-Enhanced Ergotropy in Phase-Driven Andreev Bound State Quantum Batteries. https://arxiv.org/abs/2606.24456

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