An Efficient Scheme for Multiparty Multi-particle State Sharing

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理论物理通讯 ›› 2010, Vol. 54 ›› Issue (01) : 93-97.

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An Efficient Scheme for Multiparty Multi-particle State Sharing

SHI Run-Hua,^1,2 HUANG Liu-Sheng,^1,3 YANG Wei,^1,3 and ZHONG Hong²

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Abstract

We present an efficient scheme for sharing an arbitrary m-qubit
state with n agents. In our scheme, the sender Alice first shares m
Bell states with the agent Bob, who is designated to recover the original
m-qubit state. Furthermore, Alice introduces n-1 auxiliary particles
in 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.

导出引用

SHI Run-Hua,, HUANG Liu-Sheng,, YANG Wei,, and ZHONG Hong. An Efficient Scheme for Multiparty Multi-particle State Sharing[J]. 理论物理通讯, 2010, 54(01): 93-97

SHI Run-Hua,, HUANG Liu-Sheng,, YANG Wei,, and ZHONG Hong. An Efficient Scheme for Multiparty Multi-particle State Sharing[J]. Communications in Theoretical Physics, 2010, 54(01): 93-97

中图分类号： 03.67.Dd 03.67.Ac