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

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

2005-11-23

arxiv.org/abs/quant-ph/0511223v2

J. Phys. B: At. Mol. Opt. Phys. 39 (2006) 1975-1983

Physics

Quantum Physics

6 pages, no figures; It simplifies the process for sharing an arbitrary m-qubit state in Phys. Rev. A 72, 022338 (2005) (quant

Scientific paper

10.1088/0953-4075/39/8/015

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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