Résumé
Quantum physics proved to have an edge for outstanding applications in computation and cryptography. Whether quantum technologies can help us facing the forthcoming energetic crisis remains, however, an open question. In this work, we analyze the energetic storage capacity of a simple bosonic system and show how we can boost the efficiency and the power of such a quantum battery by engineering its charging potential and its environment. The latter is constituted by a squeezed thermal reservoir whose parameters can be controlled in order to optimize the battery's performances. This exotic interaction, which can be mastered in a few well-equipped laboratories, drives the system to an nonequilibrium quantum state, which is the charged battery state. Our results showcase the effectiveness of quantum coherence in nonequilibrium thermodynamics at small scales and provide a new perspective on the design of efficient and powerful miniaturized batteries.
