Charging benefits of suppressed zero-ergotropy intervals

Investigate whether the suppression of zero-ergotropy intervals in larger multipartite atomic systems leads to improved quantum-battery charging performance.

Background

The paper studies quantum ergotropy in the Tavis–Cummings model for multipartite ensembles of two-level atoms interacting with a single-mode cavity field. Its numerical results indicate that increasing the number of atoms does not necessarily produce a substantially larger maximum ergotropy, but does tend to suppress the time intervals during which ergotropy vanishes.

The authors identify quantum batteries as a relevant application because charging performance depends not only on stored ergotropy but also on charging power and energy stability. They leave unresolved whether the more persistent nonzero ergotropy observed for larger atomic ensembles translates into an actual improvement in charging performance.