Device-dependent and device-independent quantum key distribution without a shared reference frame

Slater, Joshua A., Branciard, Cyril, Brunner, Nicolas and Tittel, Wolfgang (2014) Device-dependent and device-independent quantum key distribution without a shared reference frame. New Journal of Physics, 16 . doi:10.1088/1367-2630/16/4/043002


Author Slater, Joshua A.
Branciard, Cyril
Brunner, Nicolas
Tittel, Wolfgang
Title Device-dependent and device-independent quantum key distribution without a shared reference frame
Journal name New Journal of Physics   Check publisher's open access policy
ISSN 1367-2630
Publication date 2014-04-01
Year available 2014
Sub-type Article (original research)
DOI 10.1088/1367-2630/16/4/043002
Open Access Status DOI
Volume 16
Total pages 19
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Language eng
Abstract Standard quantum key distribution (QKD) protocols typically assume that the distant parties share a common reference frame. In practice, however, establishing and maintaining a good alignment between distant observers is rarely a trivial issue, which may significantly restrain the implementation of long-distance quantum communication protocols. Here we propose simple QKD protocols that do not require the parties to share any reference frame, and study their security and feasibility in both the usual device-dependent (DD) case - in which the two parties use well characterized measurement devices - as well as in the device-independent (DI) case - in which the measurement devices can be untrusted, and the security relies on the violation of a Bell inequality. To illustrate the practical relevance of these ideas, we present a proof-of-principle demonstration of our protocols using polarization entangled photons distributed over a coiled 10-km long optical fiber. We consider two situations, in which either the fiber spool's polarization transformation freely drifts, or randomly chosen polarization transformations are applied. The correlations obtained from measurements allow, with high probability, to generate positive asymptotic secret key rates in both the DD and DI scenarios (under the fair-sampling assumption for the latter case).
Keyword Quantum communication
Quantum cryptography
Quantum implementations
Satellite communication
Violation
Systems
States
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article ID: 043002

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
 
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Created: Sun, 04 May 2014, 10:05:51 EST by System User on behalf of Engineered Quantum Systems