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Scheme for Implementing Quantum Dense Coding with χ-Type Entangled States in Optical Systems

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Abstract

A novel scheme for realizing dense coding with χ-type entangled states in linear optical system is proposed. In this protocol, Alice encodes her classical information on photons by linear optical elements and sends these photons to Bob. Then Bob performs a sequent single-qubit measurement on all photons in the χ-type entangled state by employing linear optical elements. According to the outcomes of his measurement, Bob can determine what operation Alice performed. The scheme is based on linear optical elements, which is feasible with existing experimental technology.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant Nos. 61170270, 61003290); The Specialized Research Fund for the Doctoral Program of Higher Education (Grant Nos. 20091103120014, 20090005110010); Beijing Natural Science Foundation (Grant Nos. 4122008, 1102004); the ISN open Foundation.

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Authors and Affiliations

  1. College of Computer Science and Technology, Beijing University of Technology, Beijing, 100124, China

    Yu-Guang Yang, Juan Xia & Xin Jia

  2. State Key Laboratory of Integrated Services Network, Xidian University, Xi’an, 710071, China

    Yu-Guang Yang

  3. State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Hua Zhang

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  1. Yu-Guang Yang
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  2. Juan Xia
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  3. Xin Jia
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  4. Hua Zhang
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Correspondence to Yu-Guang Yang.

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Yang, YG., Xia, J., Jia, X. et al. Scheme for Implementing Quantum Dense Coding with χ-Type Entangled States in Optical Systems. Int J Theor Phys 51, 1917–1923 (2012). https://doi.org/10.1007/s10773-011-1068-4

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  • DOI: https://doi.org/10.1007/s10773-011-1068-4

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