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

2025/06/20 by Guedes, V. F., de Oliveira, S. T., de Oliveira, G. L. +2
#FOS: Physical sciences #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2506.17377

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.

Citations

• One-photon-interference quantum secure direct communication
• Theory of Communication Efficient Quantum Secret Sharing
• Experimental quantum secure direct communication with single photons
• Sub-Nyquist Sampling: Bridging Theory and Practice

Related

• Ultrabroadband Quantum-Secured Communication
• Quantum Shannon Information Theory -Design of communication, cipher and sensor-
• Reverse reconciliation protocols for quantum cryptography with continuous variables
• Security proof of the two-way quantum secure direct communication with channel loss and noise
• Implementation and Security Analysis of Practical Quantum Secure Direct Communication