nt - p h / 05 04 12 6 v 1 1 7 A pr 2 00 5 Quantum teleportation of an arbitrary N - qubit state using and identifying only Bell states

نویسنده

  • Zhan-jun Zhang
چکیده

First, I show a protocol to faithfully and deterministically teleport an arbitrary 2-qubit state from Alice to Bob. In this protocol two same Bell states are enough for use. Bob can recover the 2-qubit state by performing appropriate unitary operations conditioned on Alice’s two Bell-state measurement outcomes. Then I generalize the 2-qubit teleportation protocol to a N(N ≥ 3)-qubit teleportation case by using N same Bell states at beginning and identifying N Bell states after quantum swapping. By comparing with the newest relevant work [Phys. Rev. A71, 032303(2005)], the advantages of the present protocols are revealed.

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تاریخ انتشار 2008