skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Heralded-qubit amplifiers for practical device-independent quantum key distribution

Abstract

Device-independent quantum key distribution does not need a precise quantum mechanical model of employed devices to guarantee security. Despite its beauty, it is still a very challenging experimental task. We compare a recent proposal by Gisin et al.[Phys. Rev. Lett. 105, 070501 (2010)] to close the detection loophole problem with that of a simpler quantum relay based on entanglement swapping with linear optics. Our full-mode analysis for both schemes confirms that, in contrast to recent beliefs, the second scheme can indeed provide a positive key rate which is even considerably higher than that of the first alternative. The resulting key rates and required detection efficiencies of approximately 95% for both schemes, however, strongly depend on the underlying security proof.

Authors:
 [1];  [2]
  1. ETSI Telecomunicacion, Department of Signal Theory and Communications, University of Vigo, Campus Universitario, E-36310 Vigo, Pontevedra (Spain)
  2. Institut fuer Quantenoptik und Quanteninformation, Oesterreichische Akademie der Wissenschaften, Technikerstrasse 21A, A-6020 Innsbruck (Austria)
Publication Date:
OSTI Identifier:
22038560
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DATA TRANSMISSION; QUANTUM ENTANGLEMENT; QUANTUM MECHANICS; QUBITS

Citation Formats

Curty, Marcos, and Moroder, Tobias. Heralded-qubit amplifiers for practical device-independent quantum key distribution. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.010304.
Curty, Marcos, & Moroder, Tobias. Heralded-qubit amplifiers for practical device-independent quantum key distribution. United States. doi:10.1103/PHYSREVA.84.010304.
Curty, Marcos, and Moroder, Tobias. Fri . "Heralded-qubit amplifiers for practical device-independent quantum key distribution". United States. doi:10.1103/PHYSREVA.84.010304.
@article{osti_22038560,
title = {Heralded-qubit amplifiers for practical device-independent quantum key distribution},
author = {Curty, Marcos and Moroder, Tobias},
abstractNote = {Device-independent quantum key distribution does not need a precise quantum mechanical model of employed devices to guarantee security. Despite its beauty, it is still a very challenging experimental task. We compare a recent proposal by Gisin et al.[Phys. Rev. Lett. 105, 070501 (2010)] to close the detection loophole problem with that of a simpler quantum relay based on entanglement swapping with linear optics. Our full-mode analysis for both schemes confirms that, in contrast to recent beliefs, the second scheme can indeed provide a positive key rate which is even considerably higher than that of the first alternative. The resulting key rates and required detection efficiencies of approximately 95% for both schemes, however, strongly depend on the underlying security proof.},
doi = {10.1103/PHYSREVA.84.010304},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}