Quantum Key Distribution by Utilizing Four-Level Particles

TL;DR

This paper introduces new quantum key distribution protocols using four-level particles, demonstrating their security and potential for secure quantum communication.

Contribution

The paper proposes novel quantum key distribution protocols based on four-level particles and extends to controlled protocols, establishing their security.

Findings

Protocols are secure against known attacks

Utilizes four-level particles for enhanced security

Includes a controlled quantum key distribution scheme

Abstract

We present a quantum key distribution protocol based on four-level particles entanglement. Furthermore, a controlled quantum key distribution protocol is proposed by utilizing three four-level particles. We show that the two protocols are secure.