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Quantum secure direct communication of digital and analog signals using continuum coherent states

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Abstract

In this work, we present optical schemes for secure direct quantum communication of digital and analog signals using continuum coherent states and frequency-dependent phase modulation. The main advantages of the proposed schemes are that they do not use entangled states and they can be implemented with today technology. The theory of quantum interference of continuum coherent state is described, and the optical setups for secure direct communication are presented and their securities are discussed.

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Acknowledgments

This work was supported by the Brazilian agencies CAPES and CNPq via Grant no. 303514/2008-6. Also, this work was performed as part of the Brazilian National Institute of Science and Technology for Quantum Information.

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Authors and Affiliations

  1. Laboratory of Quantum Information Technology, Department of Teleinformatic Engineering, Federal University of Ceara - DETI/UFC, C.P. 6007, Campus do Pici, Fortaleza, CE, 60455-970, Brazil

    Antônio Geovan de Araújo Holanda Guerra, Francisco Franklin Sousa Rios & Rubens Viana Ramos

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  1. Antônio Geovan de Araújo Holanda Guerra
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  2. Francisco Franklin Sousa Rios
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  3. Rubens Viana Ramos
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Correspondence to Rubens Viana Ramos.

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Guerra, A.G.d.A.H., Rios, F.F.S. & Ramos, R.V. Quantum secure direct communication of digital and analog signals using continuum coherent states. Quantum Inf Process 15, 4747–4758 (2016). https://doi.org/10.1007/s11128-016-1410-0

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  • DOI: https://doi.org/10.1007/s11128-016-1410-0

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