Secure and Efficient n-Qubit Entangled State Teleportation Using Partially Entangled GHZ Channels and Optimal POVM

TL;DR

This paper presents a novel quantum teleportation protocol for n-qubit entangled states using partially entangled GHZ channels and optimal POVMs, reducing classical communication and enhancing security in quantum networks.

Contribution

It introduces a versatile teleportation scheme employing partially entangled GHZ states and improved POVMs, enabling efficient and secure quantum communication for various entangled states.

Findings

Achieves unambiguous state discrimination with optimal POVMs.

Reduces classical communication costs compared to Bell-basis teleportation.

Enhances security in quantum hop-by-hop communication.

Abstract

We introduce an efficient and versatile quantum teleportation protocol for specific types of n-qubit entangled states. By employing a partially entangled Greenberger-Horne-Zeilinger (GHZ) state as the quantum channel and an optimal Positive Operator-Valued Measure (POVM) based on an improved reciprocal state formulation, we achieve unambiguous state discrimination. The scheme has been generalized to support various entangled state configurations and demonstrates a notable reduction in classical communication costs for these states compared to standard Bell-basis teleportation. Its capacity for integration with conventional protocols is pivotal, enhancing quantum hop-by-hop communication security by allowing strategic choices in quantum channel and teleportation strategy