Abstract
We propose a scheme for cloning an arbitrary unknown two-qubit state and its orthogonal complement state with the assistance from the state preparer. Our scheme includes two stages. The first stage requires a quantum teleportation process, in which an arbitrary unknown two-qubit state can be deterministically teleported from the sender to the receiver with χ-type entangled states as the quantum channel. In the second stage, with the assistance of the state preparer, either a perfect copy or an orthogonal complement state of an arbitrary unknown two-qubit state can be obtained with a certain probability.
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Acknowledgements
This work is partly supported by the Fundamental Research Funds for the Central Universities under Grant No. 2010XS47 and the Higher Education Natural Science Foundation of Anhui Province under Grant No. KJ2010B383.
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Yuan, H., Han, LF. Assisted Cloning and Orthogonal Complementing of an Arbitrary Unknown Two-Qubit State with χ-Type Entangled States. Int J Theor Phys 52, 1282–1288 (2013). https://doi.org/10.1007/s10773-012-1443-9
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DOI: https://doi.org/10.1007/s10773-012-1443-9