Analytically Solvable Model for Qubit-Mediated Energy Transfer between Quantum Batteries

Abstract

The coherent energy transfer between two identical two-level systems is investigated. Here, the first quantum system plays the role of a charger, while the second can be seen as a quantum battery. Firstly, a direct energy transfer between the two objects is considered and then compared to a transfer mediated by an additional intermediate two-level system. In this latter case, it is possible to distinguish between a two-step process, where the energy is firstly transferred from the charger to the mediator and only after from the mediator to the battery, and a single-step in which the two transfers occurs simultaneously. The differences between these configurations are discussed in the framework of an analytically solvable model completing what recently discussed in literature.

Perspective on new implementations of atomtronic circuits

“…Chiral quantum spin states in triangular geometries have been obtained experimentally [295] and quantum optimal control protocols [296] have been proposed to prepare quantum current states and their superpositions in ring geometries tuning properly local detunings in time [297]. The possibility to engineer spin networks and the local control on Hamiltonian parameters lets Rydberg atoms networks also be a promising platform to realize quantum state transfer [298][299][300][301][302][303][304] and quantum batteries [305][306][307][308][309]. Due to the long range interaction and the specific capabilities of cold atoms, we note that source-to-drain transfer through Rydberg networks could define new problems in quantum transport.…”