Experimental Quantum Multiparty Communication Protocols

TL;DR

This paper reports the experimental implementation of three-party quantum communication protocols using a single qutrit, demonstrating scalable and efficient quantum information transfer, cryptography, and computation techniques.

Contribution

It presents the first experimental realization of multiple quantum communication protocols with a single three-level quantum system (qutrit).

Findings

Successful implementation of secret sharing, Byzantine agreement, and communication complexity reduction.

Protocols are scalable and do not require complex entangled states.

Optical fiber interferometric setup enables efficient and versatile quantum communication.

Abstract

Quantum information science breaks limitations of conventional information transfer, cryptography and computation by using quantum superpositions or entanglement as resources for information processing. Here, we report on the experimental realization of three-party quantum communication protocols using single three-level quantum system (qutrit) communication: secret sharing, detectable Byzantine agreement, and communication complexity reduction for a three-valued function. We have implemented these three schemes using the same optical fiber interferometric setup. Our realization is easily scalable without sacrificing detection efficiency or generating extremely complex many-particle entangled states.