Secure quantum conversation through non-destructive discrimination of highly entangled multipartite states

TL;DR

This paper introduces a secure quantum communication protocol utilizing non-destructive discrimination of multipartite entangled states, enabling classical information exchange without destroying entanglement, and proves its security in ideal channels.

Contribution

It presents a novel scheme for quantum conversation using non-destructive discrimination of highly entangled states, with detailed circuit implementation and security proof.

Findings

The scheme allows measurement without destroying entanglement.

It is secure in noiseless and lossless quantum channels.

The protocol facilitates classical communication via quantum entanglement.

Abstract

"Quantum conversation" is a way in which two parties can communicate classical information with each other using entanglement as a shared resource. We present this scheme using a multipartite entangled state after describing its generation through appropriate circuit diagrams. We make use of a discrimination scheme which allows one to perform a measurement on the system without destroying its entanglement. We later prove that this scheme is secure in a noiseless and a lossless quantum channel.