Extractable Work, the Role of Correlations, and Asymptotic Freedom in Quantum Batteries

Marcello Andolina
July 11th, 2019 MARCELLO ANDOLINA Scuola Normale Superiore

In this talk I will introduce Dicke batteries, namely a quantum battery made of N two-level systems, which is charged by an optical mode. I will cover [1], where we quantify the fraction of energy stored in the battery that can be extracted in order to perform thermodynamic work. We first demonstrate that this quantity is highly reduced by the presence of correlations between the charger and the battery or between the subsystems composing the battery. We then show that the correlation-induced suppression of extractable energy, however, can be mitigated by preparing the charger in a coherent optical state. We conclude by proving that the charger-battery system is asymptotically free of such locking correlations in the N→∞ limit.

Seminar, July 11, 2019, 12:00. ICFO’s Seminar Room

Hosted by Prof. Maciej Lewenstein