Quantum Teleportation within a Quantum Network

TL;DR

This paper proposes two schemes for quantum teleportation within a network using (n+1)-partite GHZ states, generalizes them for multi-qubit states, and suggests experimental methods for generating the necessary entangled states.

Contribution

It introduces two novel teleportation schemes for multi-receiver quantum networks and proposes experimental setups for creating the required GHZ states.

Findings

Two teleportation schemes using GHZ states are effective for multi-receiver networks.

Generalization to multi-qubit states enhances quantum communication capabilities.

Experimental proposals address practical challenges in GHZ state generation.

Abstract

We consider the problem of teleporting an unknown information state within a quantum network by a sender, say, Alice to any given receiver out of several receivers, say, Bob(1), Bob(2), ...., Bob(n). For this task, we suggest two schemes using (n+1)-partite GHZ state as a quantum channel. The first scheme involves C-NOT operations on qubit of Bobs with the control as qubit of Alice, while the second scheme involves measurements in the Hadamard basis by Bobs on their qubits. We have generalized both schemes for quantum teleportation of arbitrary m-qubit information state within the quantum network. Further, we have proposed two experimental schemes for the generation of (n+1)-partite GHZ state using interaction between highly detuned \Lambda-type three-level atoms and optical coherent field. We also discuss the possible experimental imperfections like, atomic-radiative time, cavity damping time and atom-cavity interaction time.