Quantum Communication Network Utilizing Quadripartite Entangled States of Optical Field

TL;DR

This paper proposes quantum dense coding networks using quadripartite entangled optical states, enabling flexible information exchange among multiple parties with experimentally feasible schemes.

Contribution

It introduces two novel quantum communication network schemes utilizing quadripartite entangled states with three-party correlations, expanding quantum communication capabilities.

Findings

Channel capacities are numerically calculated for various protocols.

Quadripartite entangled states used are experimentally realizable.

Proposed schemes are feasible with current laboratory technology.

Abstract

We propose two types of quantum dense coding communication networks with optical continuous variables, in which a quadripartite entangled state of the optical field with totally three-party correlations of quadrature amplitudes is utilized. In the networks, the exchange of information between any two participants can be manipulated by one or two of the remaining participants. The channel capacities for a variety of communication protocols are numerically calculated. Due to the fact that the quadripartite entangled states applied in the communication systems have been successfully prepared already in the laboratory, the proposed schemes are experimentally accessible at present.