Energy transfer

Electrical engineering

Physics

Topology (electrical circuits)

Energy (signal processing)

Statistical physics

Engineering

Coupling (piping)

Parallel computing

Atomic physics

Power (physics)

Transfer (computing)

Quantum system

Computer science

Battery (electricity)

Quantum mechanics

Maximum power transfer theorem

Mechanical engineering

Quantum

Physical review. B./Physical review. B

We present a systematic analysis and classification of several models of quantum batteries involving different combinations of two level systems and quantum harmonic oscillators. In particular, we study energy transfer processes from a given quantum system, termed charger, to another one, i.e. the proper battery. In this setting, we analyze different figures of merit, including the charging time, the maximum energy transfer, and the average charging power. The role of coupling Hamiltonians which do not preserve the number of local excitations in the charger-battery system is clarified by properly accounting them in the global energy balance of the model.

Charger-mediated energy transfer in exactly solvable models for quantum batteries