Quantum networking with short-range entanglement assistance

TL;DR

This paper introduces a method to enhance long-range entanglement distribution in quantum networks by utilizing auxiliary short-range entanglement assistance and catalyst states, significantly improving efficiency.

Contribution

It presents a novel entanglement assistance scheme using recycled catalyst states and auxiliary paths to boost long-range entanglement distribution in quantum networks.

Findings

Entanglement assistance increases distribution rates

Catalyst states are recycled and replenished efficiently

Significant improvement over non-assisted methods

Abstract

We propose an approach to distribute high-fidelity long-range entanglement in a quantum network assisted by the entanglement supplied by auxiliary short-range paths between the network nodes. Entanglement assistance in the form of shared catalyst states is utilized to maximize the efficiency of entanglement concentration transformations over the edges of the network. The catalyst states are recycled for use in adaptive operations at the network nodes and replenished periodically using the auxiliary short-range paths. The rate of long-range entanglement distribution using such entanglement assistance is found to be significantly higher than possible without using entanglement assistance.