Journal
CHINESE PHYSICS B
Volume 31, Issue 5, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1674-1056/ac43b0
Keywords
IBM quantum experience; controlled quantum teleportation; fidelity; quantum state tomography
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Funding
- National Natural Science Foundation of China [61802033, 62172060]
- Key Research and Development Project of Sichuan Provincial Science and Technology Plan, China [2020YFS0445]
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This paper presents a scheme for arbitrary two-qubit quantum controlled teleportation, where the quantum state is transmitted and reconstructed under the supervision of a third party. The scheme's operation process is verified experimentally and its security is analyzed and proven through the introduction of different photonic states.
Quantum controlled teleportation is the transmission of the quantum state under the supervision of a third party. This paper presents the theoretical and experimental results of an arbitrary two-qubit quantum controlled teleportation scheme, in which the sender Alice only needs to perform two Bell state measurements and the receiver Bob can perform an appropriate unitary operation to reconstruct the arbitrary two-qubit states under the control of the supervisor Charlie. The operation process of the scheme is verified on the IBM quantum experience platform, and the accuracy of the transmitted quantum state is further checked by performing quantum state tomography. Meanwhile, a good fidelity is obtained by using the theoretical density matrix and the experimental density matrix. A sequence of photonic states is introduced to analyze the possible intercept-replace-resend, intercept-measure-resend, and entanglement-measure-resend attacks on this scheme. The results proved that our scheme is highly secure.
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