Asymmetric Bidirectional Quantum Teleportation via Seven-qubit Cluster State

Bidirectional quantum teleportation realizes the quantum communication between two parties in a quantum communication network. To reduce the quantum resources consumed by quantum channels and the classical resources consumed in the communication process, we propose an asymmetric bidirectional quantum teleportation protocol via a seven-qubit cluster state as quantum channels. Alice can send the three-qubit entanglement state to Bob in the proposed protocol. Meanwhile, Bob can send the two-qubit entanglement state to Alice. Then, our protocol performs a local CNOT gate operation. Next, Alice and Bob perform the GHZ state measurement and the corresponding unitary operation to complete the process of quantum teleportation. As a result, our protocol has higher inherent efficiency and less operational complexity than other protocols.