期刊
QUANTUM INFORMATION PROCESSING
卷 10, 期 1, 页码 53-61出版社
SPRINGER
DOI: 10.1007/s11128-010-0176-z
关键词
Quantum information; Quantum communication; Quantum cryptography; Quantum secret sharing
资金
- National Natural Science Foundation of China [90818005, 60903217, 60773032, 60773114]
- Ministry of Education of China [20060358014]
We present a scheme for asymmetric multi-party quantum state sharing of an arbitrary m-qubit state with n agents. The sender Alice first shares m - 1 Bell states and one n + 1-particle Greenberger-Horne-Zeilinger state with n agents, where the agent Bob, who is designated to recover the original m-qubit state, just keeps m particles and other agents (all controllers) n - 1 particles, that is, each controller only holds one particle in hand. Subsequently, Alice performs m Bell-basis measurements on her 2m particles and each controller only need take a single-particle measurement on his particle with the basis X. Finally, Bob can recover the original m-qubit state with the corresponding local unitary operations according to Alice and all controllers' measurement results. Its intrinsic efficiency for qubits approaches 100%, and the total efficiency really approaches the maximal value, which is higher than those of the known symmetric schemes.
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