Quantum secure direct communication of continuous-time signals using Whittaker Nyquist Shannon theorem

TL;DR

This paper introduces a novel quantum secure direct communication protocol for continuous signals, utilizing the Whittaker-Nyquist-Shannon theorem, with experimental validation demonstrating practical implementation using standard optical devices.

Contribution

It presents a new quantum communication protocol for continuous signals that is both secure and practically implementable with existing optical technology.

Findings

Secure transmission of continuous signals demonstrated

Protocol is compatible with commercial optical devices

Experimental validation confirms feasibility

Abstract

In the present work, we provide a new quantum secure direct communication protocol and its experimental implementation. The proposed protocol can be used to transfer, in a secure way, continuous signals, like audio signal, from Alice to Bob. The security is guaranteed by the quantum nature of optical signals and the Whittaker-Nyquist-Shannon theorem. Furthermore, it can be easily implemented with common optical devices that are commercially available.