Secured Quantum Communication of Entangled State as a Quantum Channel

This paper presents a theoretical scheme of Bidirectional Controlled Quantum Teleportation of a one-qubit state by utilizing nine qubits as the quantum channel. In the proposed scheme, Alice and Bob symmetrically teleport quantum information to each other under controller Candy. Alice transfers an unknown 2-one qubit state to Bob and simultaneously Bob teleports an unknown different 2-one qubit state to Alice under the permission of Candy as a controller. The quantum state information can be successfully transmitted if Alice and Bob apply Bell-State measurement and controller Candy applies Single-Qubit measurement on their qubits. By using the classical channel, users applied an appropriate unitary transformation on their qubit to reconstruct the desired state. The proposed protocol is run on ibmq_qasm_simulator of 32 qubits on the IBM Quantum Composer platform. Then, we take a comparison of our scheme with other schemes on the basis of the type of protocol, quantum information transmitted, classical resource consumption, quantum resource consumption and intrinsic efficiency.