Diffusive lossless energy and coherence transfer by noisy coupling

TL;DR

This paper demonstrates that noisy coupling enables lossless, diffusive energy transfer in quantum systems, maintaining quantum coherence and entanglement even under strong dephasing conditions.

Contribution

It reveals a novel mechanism where noisy coupling facilitates energy transfer without loss, preserving quantum properties despite dephasing.

Findings

Noisy coupling induces diffusive, lossless energy transfer.

Quantum coherence and entanglement are maintained during transfer.

Energy transfer persists despite strong local dephasing.

Abstract

Here we show that noisy coupling can lead to diffusive lossless energy transfer between individual quantum systems retaining a quantum character leading to entangled stationary states. Coherence might flow diffusively while being summarily preserved even when energy exchange is absent. Diffusive dynamics persists even in the case when additional noise suppresses all the unitary excitation exchange: arbitrarily strong local dephasing, while destroying quantum correlations, is not affecting energy transfer.