Controlled bi-directional quantum teleportation of superposed coherent state using five qubit cluster-type entangled coherent state as a resource

TL;DR

This paper presents a scheme for controlled bi-directional quantum teleportation of superposed coherent states using a five-qubit cluster-type entangled coherent state, achieving high fidelity with linear optics.

Contribution

It introduces a novel protocol utilizing five-mode cluster-type entangled coherent states for efficient bi-directional teleportation with control.

Findings

Near-perfect teleportation fidelity for moderate coherent amplitudes

Utilizes linear optical devices like beam splitters and photon counters

Applicable for quantum communication between distant parties

Abstract

We consider the problem of bi-directional controlled quantum teleportation of information encoded in phase opposite coherent state among two distant partners Alice and Bob, with the consent of controller, Charlie. We use five-mode cluster-type entangled coherent state as the quantum resource to achieve this task. The scheme uses linear optical devices such as beam splitter, phase shifters, and photon counters. We have shown that for moderately large coherent amplitude, near-perfect bi-directional controlled teleportation can be obtained in terms of the average fidelity of teleportation.