A Novel Protocol for Bidirectional Controlled Quantum Teleportation of Two-Qubit States Via Seven-Qubit Entangled State in Noisy Environment
In this paper, a novel protocol of bidirectional controlled quantum teleportation (BCQT) via seven-qubit state is proposed. Where Alice and Bob, two legitimate users, can teleport two-qubit states to each other. In the whole process, users achieve the initial state based on preprocessing of quantum channel, Bell-state measurement (BSM), single-qubit measurement (SM), unitary operations and so on. The main superiority of the proposed protocol is more efficient compared with previous work. In addition, the proposed protocol is considered in noisy channel, it shows that the fidelities under amplitude-damping (AD) and phase-damping (PD) noise only rest with the amplitude parameter of the initial state and the decoherence noisy rate.
KeywordsBidirectional controlled quantum teleportation Seven-qubit entangled state Amplitude-damping noise Phase-damping noise
This work is supported by the National Key R&D Plan under Grant No. 2018YFC1200200 and 2018YFC1200205, National Natural Science Foundation of China under Grant No. 61463016 and “Science and technology innovation action plan” of Shanghai in 2017 under Grant No. 17510740300. H.I. and National Natural Science Foundation of China under grant No.11404415.
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