Asymmetric bidirectional quantum state exchange between Alice and Bob through a third party

Abstract

In this paper we present a quantum communication protocol which utilizes a multipartite multi-qubit entangled channel for mutual transfer of three-qubit generalized W-state and arbitrary two-qubit entangled state between two parties. The protocol is perfect with no cases of failure and is supervised by a third party. The work is in the direction of the recently initiated line of research on exploring the possibility of simultaneous quantum multitasking using multipartite entanglement.