Quantum key distribution based on a quantum retrodiction protocol

TL;DR

This paper explores a quantum key distribution protocol based on quantum retrodiction, demonstrating its efficiency and enhanced security over traditional protocols for qubit and higher-dimensional systems.

Contribution

It introduces a novel QKD protocol utilizing quantum retrodiction, showing improved security and efficiency compared to existing methods.

Findings

More secure than BB84 and six-state protocols for qubits

Efficient raw key generation per run

Applicable to higher-dimensional quantum systems

Abstract

This paper is withdrawn. We study the quantum key distribution (QKD) protocol based on a quantum retrodiction protocol, namely the so-called mean king problem. The security is analyzed by considering the eavesdropping on both the preparation of the entangled pair and the transmission of the quantum state. This QKD protocol can generate efficiently a bit of raw key in every single run. We find that, for qubit system, it is more secure than the QKD Bennett-Brassard 1984 protocol and the six-state protocol. This QKD protocol works also for higher dimensional system.