Abstract
A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Horne-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.
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The work is supported by the National Natural Science Foundation of China (Grant No. 10534030).
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Liu, Yl., Man, Zx. & Xia, Yj. Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers. Optoelectron. Lett. 4, 283–286 (2008). https://doi.org/10.1007/s11801-008-7162-z
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DOI: https://doi.org/10.1007/s11801-008-7162-z