We consider multi-path routing of entanglement in quantum networks, where a pre-prepared multipartite entangled 2D cluster state serves as a resource to perform different tasks on demand. We show how to achieve parallel connections between multiple, freely chosen groups of parties by performing appropriate local measurements among diagonal paths, which preserves the entanglement structure of the remaining state. We demonstrate how to route multiple Bell-states along parallel lines via crossings, turns and fade-in/-outs, analogously to a data bus. The results apply to networks at any scale.
@article{arxiv.2404.06578,
title = {Flexible quantum data bus for quantum networks},
author = {Julia Freund and Alexander Pirker and Wolfgang Dür},
journal= {arXiv preprint arXiv:2404.06578},
year = {2026}
}
Comments
Note that we have corrected Figure 2 (data bus) and 6 (parallel transport), as we found a drawing error. In this sense, the version differs from the Journal version