Quantum steering as a probe of energy transfer in quantum batteries
Phys. Rev. A 113, 022209 – Published 11 February, 2026
DOI: https://doi.org/10.1103/rkyk-14dj
Abstract
This study investigates the role of Einstein-Podolsky-Rosen steering in characterizing the energy dynamics of quantum batteries (QBs) within a charging system that features shared reservoirs. After optimizing parameter configurations to achieve high-energy systems, we observe that steering serves as a vital resource across a variety of charging scenarios with low-dissipation regimes: it is initially stored until the system reaches energy equilibrium, and then subsequently utilized to sustain the enhancement of energy storage. Furthermore, steering acts as a witness to battery population balance and a consumable that enhances extractable work. Additionally, we discuss the contribution of the steering potential to energy upon high-dissipation charging in detail. These findings establish an indicator for monitoring QB energy variations, which will be beneficial to achieve the high-performance quantum batteries.
