Long-distance dissipation-assisted transport of entangled states via a chiral waveguide

TL;DR

This paper proposes a dissipative protocol for high-fidelity transport of entangled states across quantum network nodes using a chiral waveguide, enabling long-distance quantum communication despite noise.

Contribution

It introduces a novel dissipative transport method leveraging chiral waveguides to transfer entangled states with high fidelity in quantum networks.

Findings

Bell states transported with 95.4% fidelity

Multipartite W- and Dicke states successfully transported

Protocol effective despite noisy communication channels

Abstract

Quantum networks provide a prominent platform for realizing quantum information processing and quantum communication, with entanglement being a key resource in such applications. Here, we describe the dissipative transport protocol for entangled states, where entanglement stored in the first node of quantum network can be transported with high fidelity to the second node via a 1D chiral waveguide. In particular, we exploit the directional asymmetry in chirally-coupled single-mode ring resonators to transport entangled states. For the fully chiral waveguide, Bell states, multipartite $W$-states and and Dicke states can be transported with fidelity as high as $0.954$, despite the fact that the communication channel is noisy. Our proposal can be utilized for long-distance distribution of multipartite entangled states between the quantum nodes of the open quantum network.