An Efficient Scheme for Multiparty Multi-particle State Sharing |
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Authors: | SHI Run-Hua HUANG Liu-Sheng YANG Wei ZHONG Hong |
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Institution: | 1.NHPCC, Depart. of CS. & Tech., University of Science and Technology;of China, Hefei 230027, China
;2.School of Computer Science and Technology, Anhui University, Hefei 230039, China
;3.Suzhou Institute for Advanced Study, Suzhou 215123, China |
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Abstract: | We present an efficient scheme for sharing an arbitrary m-qubitstate with n agents. In our scheme, the sender Alice first shares mBell states with the agent Bob, who is designated to recover the originalm-qubit state. Furthermore, Alice introduces n-1 auxiliary particlesin the initial state |0>, applies Hadamard (H) gate and Controlled-Not (CNOT) gate operations on the particles, which make them entangled with one of m particle pairs in Bell states, and then sends them to the controllers (i.e., other n-1 agents), where each controller only holds one particle in hand. After Alice performing m Bell-basis measurements and each controller a single-particle measurement, the recover Bob can obtain the original unknown quantum state by applying the corresponding local unitary operations on his particles.Its intrinsic efficiency for qubits approaches 100%, and the total efficiency really approaches the maximal value. |
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Keywords: | quantum information quantum cryptography quantum secret sharing |
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