Conclusive quantum steering with superconducting transition-edge sensors

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Title Conclusive quantum steering with superconducting transition-edge sensors
Author Smith, Devin H.; Gillett, Geoff; Almeida, Marcelo P. de; Branciard, Cyril; Fedrizzi, Alessandro; Weinhold, Till J.; Lita, Adriana; Calkins, Brice; Gerrits, Thomas; Wiseman, Howard Mark; Nam, Sae Woo; White, Andrew G.
Journal Name Nature Communications
Year Published 2012
Place of publication United Kingdom
Publisher Nature Publishing Group
Abstract Quantum steering allows two parties to verify shared entanglement even if one measurement device is untrusted. A conclusive demonstration of steering through the violation of a steering inequality is of considerable fundamental interest and opens up applications in quantum communication. To date, all experimental tests with single-photon states have relied on post selection, allowing untrusted devices to cheat by hiding unfavourable events in losses. Here we close this 'detection loophole' by combining a highly efficient source of entangled photon pairs with superconducting transition-edge sensors. We achieve an unprecedented ~62% conditional detection efficiency of entangled photons and violate a steering inequality with the minimal number of measurement settings by 48 s.d.s. Our results provide a clear path to practical applications of steering and to a photonic loophole-free Bell test.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1038/ncomms1628
Copyright Statement Copyright 2012 Nature Publishing Group. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
Volume 3
Page from 625-1
Page to 625-6
ISSN 2041-1723
Date Accessioned 2012-05-28; 2012-09-20T22:36:06Z
Date Available 2012-09-20T22:36:06Z
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Quantum Information, Computation and Communication; Quantum Optics
URI http://hdl.handle.net/10072/46930
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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