We exploit controlled breaking of time-reversal symmetry to realize coherent routing of quantum information in spin networks. The key component of our scheme is a spin triangle whose chirality is determined by the quantum state of a control qubit which thus defines the propagation direction, or a superposition thereof, of the quantum information. We then consider a particular realization of a coherent router using Rydberg atoms. Our results can facilitate scalable quantum information processing and communication in large arrays of Rydberg atoms.
@article{arxiv.2310.10390,
title = {Chiral quantum router with Rydberg atoms},
author = {Nikolaos E. Palaiodimopoulos and Simon Ohler and Michael Fleischhauer and David Petrosyan},
journal= {arXiv preprint arXiv:2310.10390},
year = {2024}
}