Optimal pair-generation rate for entanglement-based quantum key distribution

Catherine Holloway, John A. Doucette, Christopher Erven, Jean-Philippe Bourgoin, and Thomas Jennewein
Phys. Rev. A 87, 022342 – Published 27 February 2013

Abstract

In entanglement-based quantum key distribution (QKD), the generation and detection of multiphoton modes leads to a trade-off between entanglement visibility and twofold coincidence events when maximizing the secure key rate. We produce a predictive model for the optimal twofold coincidence probability per coincidence window given the channel efficiency and detector dark count rate of a given system. This model is experimentally validated and used in simulations for QKD with satellites as well as optical fibers.

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  • Received 30 October 2012

DOI:https://doi.org/10.1103/PhysRevA.87.022342

©2013 American Physical Society

Authors & Affiliations

Catherine Holloway1,*, John A. Doucette2, Christopher Erven1, Jean-Philippe Bourgoin1, and Thomas Jennewein1

  • 1Institute for Quantum Computing, University of Waterloo, 200 University Ave. West, Waterloo, Ontario, Canada N2L 3G1
  • 2David R. Cheriton School of Computer Science, University of Waterloo, 200 University Ave. West, Waterloo, Ontario, Canada N2L 3G1

  • *c2hollow@iqc.ca

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Vol. 87, Iss. 2 — February 2013

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