Scheme for Implementing Assisted Cloning of an Unknown Tripartite Entangled State |
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Authors: | Jin Shi You-Bang Zhan |
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Institution: | (1) Department of Physics, Huaiyin Teachers College, Huaian, 223001, Jiangsu, China;(2) CCAST (World Laboratory), P.O. Box 8730, Beijing, 100080, China |
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Abstract: | In this paper, we propose a protocol which can realize quantum cloning of an unknown tripartite entangled state and its orthogonal
complement state with assistance from a state preparer. The first stage of the protocol requires usual teleportation via three
entangled particle pairs as quantum channel. In the second stage of the protocol, the perfect copies and complement copies
of an unknown state can be produced with the assistance (through a tripartite projective measurement) of the state preparer.
We also present a scheme for the teleportation by using non-maximally entangled quantum channel. It is shown that the clones
and complement clones of the unknown state can be obtained with certain probability in the latter scheme. |
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Keywords: | Quantum cloning Tripartite entangled state Tripartite projective measurement Unitary transformation |
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