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Optimal joint remote state preparation of equatorial states

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Abstract

We present a scheme for optimal joint remote state preparation of two-qubit equatorial states. Our protocol improves on a previous scheme (Choudhury and Dhara in Quantum Inf Process 14:373–379, 2015) that had a success probability of 25 %, which increased to 50 % when extra classical information is sent to the receiver. We show that using our modified scheme, the desired state can be prepared deterministically with the same quantum channel. Moreover, we generalize the scheme to prepare N-qubit equatorial states in which the receiver can reconstruct the original state with 100 % success probability.

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Author information

Authors and Affiliations

  1. Department of Physics, Chongqing University, Chongqing, 401331, China

    Xihan Li

  2. Department of Physics and Computer Science, Wilfrid Laurier University, Waterloo, N2L 3C5, Canada

    Xihan Li & Shohini Ghose

  3. Institute for Quantum Computing, University of Waterloo, Waterloo, N2L 3G1, Canada

    Shohini Ghose

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  1. Xihan Li
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  2. Shohini Ghose
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Correspondence to Xihan Li.

Additional information

X.L. is supported by the National Natural Science Foundation of China under Grant No. 11574038 and the Fundamental Research Funds for the Central Universities under Grant No. CQDXWL-2012-014. S.G. acknowledges support from the Ontario Ministry of Research and Innovation and the Natural Sciences and Engineering Research Council of Canada.

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Li, X., Ghose, S. Optimal joint remote state preparation of equatorial states. Quantum Inf Process 14, 4585–4592 (2015). https://doi.org/10.1007/s11128-015-1141-7

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  • DOI: https://doi.org/10.1007/s11128-015-1141-7

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