Asymmetric multi-party quantum state sharing of an arbitrary m-qubit state |
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Authors: | Run-hua Shi Liu-sheng Huang Wei Yang Hong Zhong |
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Affiliation: | 1. NHPCC, School of Computer Science and Technology, USTC, Hefei, 230027, China 2. School of Computer Science and Technology, Anhui University, Hefei, 230039, China 3. Suzhou Institute for Advanced Study, USTC, Suzhou, 215123, China
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Abstract: | 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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Keywords: | |
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