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arXiv · 2202.01025

Enhancing coherent energy transfer between quantum devices via a mediator

Alba Crescente·Dario Ferraro·Matteo Carrega·Maura Sassetti
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Abstract

We investigate the coherent energy transfer between two quantum systems mediated by a quantum bus. In particular, we consider the energy transfer process between two qubits, and how it can be influenced by using a third qubit or photons in a resonant cavity as mediators. Inspecting different figures of merit and considering both on and off-resonance configurations, we characterize the energy transfer performances. We show that, while the qubit-mediated transfer shows no advantages with respect to a direct coupling case, the cavity-mediated one is progressively more and more efficient as function of the number of photons stored in the cavity that acts as a quantum bus. The speeding-up of the energy transfer time, due to a quantum mediator paves the way for new architecture designs in quantum technologies and energy based quantum logics.

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Alba Crescente, Dario Ferraro, Matteo Carrega, Maura Sassetti. 2022-02-02. Enhancing coherent energy transfer between quantum devices via a mediator. https://doi.org/10.1103/physrevresearch.4.033216

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