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Coherent state quantum key distribution based on entanglement sudden death

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Abstract

A method for quantum key distribution (QKD) using entangled coherent states is discussed which is designed to provide key distribution rates and transmission distances surpassing those of traditional entangled photon pair QKD by exploiting entanglement sudden death. The method uses entangled electromagnetic signal states of ‘macroscopic’ average photon numbers rather than single photon or entangled photon pairs, which have inherently limited rate and distance performance as bearers of quantum key data. Accordingly, rather than relying specifically on Bell inequalities as do entangled photon pair-based methods, the security of this method is based on entanglement witnesses and related functions.

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Acknowledgments

This research was supported by the DARPA QUINESS program through US Army Research Office award W31P4Q-12-1-0015.

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Authors and Affiliations

  1. Quantum Communication and Measurement Laboratory, Division of Natural Science and Mathematics, Department of Electrical and Computer Engineering, Boston University, Boston, MA, 02215, USA

    Gregg Jaeger

  2. Department of Physics and Astronomy, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA

    David Simon

  3. Department of Electrical and Computer Engineering, Boston University, 8 Saint Marys Street, Boston, MA, 02215, USA

    David Simon & Alexander V. Sergienko

  4. Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, MA, 02215, USA

    Alexander V. Sergienko

Authors
  1. Gregg Jaeger
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  2. David Simon
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  3. Alexander V. Sergienko
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Correspondence to Gregg Jaeger.

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Jaeger, G., Simon, D. & Sergienko, A.V. Coherent state quantum key distribution based on entanglement sudden death. Quantum Inf Process 15, 1117–1133 (2016). https://doi.org/10.1007/s11128-015-1063-4

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  • DOI: https://doi.org/10.1007/s11128-015-1063-4

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