Bidirectional Teleportation of a Pure EPR State by using GHZ states

TL;DR

This paper introduces a new bidirectional quantum teleportation protocol that uses GHZ states and entanglement swapping, enabling simultaneous transmission of EPR states more efficiently than previous methods.

Contribution

It presents a novel, economical scheme for bidirectional teleportation of EPR states using GHZ states and entanglement swapping, improving upon prior protocols.

Findings

Allows simultaneous bidirectional teleportation of EPR states

Uses fewer qubits compared to previous protocols

Enhances efficiency of quantum communication

Abstract

In the present paper, a novel bidirectional quantum teleportation protocol is proposed. By using entanglement swapping technique, two GHZ states are shared as a quantum channel between Alice and Bob as legitimate users. In this scheme, based on control-not operation, single-qubit measurement and appropriate unitary operations, two users can simultaneously transmit a pure EPR state to each other. While, in the previous protocols, the users can just teleport a single-qubit state to each other via more than four-qubit state. Therefore, the proposed scheme is economical compared with previous protocols.