One-way network nonlocality of continuous variable entangled networks

TL;DR

This paper introduces a novel device-independent method to verify nonlocality in continuous-variable quantum networks with two entangled states and one-way classical communication, advancing quantum communication verification.

Contribution

It is the first to demonstrate a method for verifying network nonlocality in all optical continuous-variable quantum networks with one-way communication.

Findings

First method to verify nonlocality in continuous-variable networks

Applicable to all optical quantum networks with two entangled states

Enables device-independent verification of quantum correlations

Abstract

Nonlocality is a key feature of quantum networks and is being studied for its potential applications in quantum communication and computing. Understanding and harnessing nonlocality in quantum networks could lead to the development of faster and more secure communication systems. All the nonclassicalities are limited to discrete variable quantum networks. We propose the first method to verify the network nonlocality of all optical quantum network consisting of two entangled states where one-way classical communication is allowed. This provides the first device-independent method to verify the quantum correlations generated from all optical continuous-variable quantum networks.