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Efficient symmetric multiparty quantum state sharing of an arbitrary m-qubit state

Xi-Han Li·Ping Zhou·Chun-Yan Li·Hong-Yu Zhou·Fu-Guo Deng
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Abstract

We present a scheme for symmetric multiparty quantum state sharing of an arbitrary $m$-qubit state with $m$ Greenberger-Horne-Zeilinger states following some ideas from the controlled teleportation [Phys. Rev. A \textbf{72}, 02338 (2005)]. The sender Alice performs $m$ Bell-state measurements on her $2m$ particles and the controllers need only to take some single-photon product measurements on their photons independently, not Bell-state measurements, which makes this scheme more convenient than the latter. Also it does not require the parties to perform a controlled-NOT gate on the photons for reconstructing the unknown $m$-qubit state and it is an optimal one as its efficiency for qubits approaches the maximal value.

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Xi-Han Li, Ping Zhou, Chun-Yan Li, Hong-Yu Zhou, Fu-Guo Deng. 2006-04-06. Efficient symmetric multiparty quantum state sharing of an arbitrary m-qubit state. https://doi.org/10.1088/0953-4075/39/8/015

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