Abstract
We present two schemes for deterministic assisted clone(DAC) of an unknown two- and three-qubit entangled states with assistance via muti-qubit Brown state. In the schemes, the sender wish to teleport an unknown original entangled state which from the state preparer, and then create a perfect copy of the unknown state at her place. The DAC schemes include two stages. The first stage requires teleportation with Bell-state measurements via a five-qubit Brown state(or seven-qubit Brown state) as the quantum channel. In the second stage, to help the sender realize the quantum cloning, the state preparer performs projective measurements on their own particles which from the sender, then the sender can acquire a perfect copy of the unknown state by means of some appropriate unitary operations. Furthermore, the total success probability for assisted cloning a perfect copy of the unknown state can reach 1 in our schemes.
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Acknowledgements
K. Hou acknowledge the Natural Science Foundation of Anhui Province (Grant No.1608085QA23), Natural Science Foundation of Anhui Provincial Education Department (Grant No.KJ2016JD17). C. J. Zhu and Y. P. Yang acknowledge the National Key Basic Research Special Foundation (Grant No.2016YFA0302800); the 973 Program (Grant No.2013CB632701); the Joint Fund of the National Natural Science Foundation (Grant No.U1330203); the National Nature Science Foundation (Grant No.11504272); the Shanghai Science and Technology Committee (STCSM) (Grants No.15XD1503700).
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Hou, K., Zhu, CJ. & Yang, YP. Deterministic Assisted Clone of an Arbitrary Two- and Three-qubit States via Multi-qubit Brown State. Int J Theor Phys 56, 2588–2600 (2017). https://doi.org/10.1007/s10773-017-3414-7
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DOI: https://doi.org/10.1007/s10773-017-3414-7