| Full text | |
| Author(s): |
Medina, Ivan
;
Culhane, Oisin
;
Binder, Felix C.
;
Landi, Gabriel T.
;
Goold, John
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Physical Review Letters; v. 134, n. 22, p. 6-pg., 2025-06-05. |
| Abstract | |
Anomalous thermal relaxation is ubiquitous in nonequilibrium statistical mechanics. An emblematic example of this is the Mpemba effect, where an initially "hot" system cools faster than an initially "cooler" one. This effect has recently been studied in a variety of different classical and quantum settings. In this Letter, we find a novel signature of the Mpemba effect in the context of quantum batteries. We identify situations where batteries in higher charge states can discharge faster than less charged states. Specifically, we consider a quantum battery encoded in a single bosonic mode that is charged using unitary Gaussian operations. We show that the ergotropy, used here as a dynamical indicator of the energy stored in the battery, can be recast as a phase space relative entropy between the system's state and the unitarily connected passive state, at each time. Our formalism allows us to compute the ergotropy analytically under dissipative dynamics and allows us to understand the conditions which give rise to a Mpemba effect. We also find situations where two batteries charged to the same value using different operations can discharge at different rates. (AU) | |
| FAPESP's process: | 22/08786-2 - Non-classical resources for NV centres quantum batteries |
| Grantee: | Ivan Medina |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 23/14488-7 - Towards room temperature nuclear spins Quantum Batteries: an approach to NV centre platform |
| Grantee: | Ivan Medina |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |