Violation of the Leggett–Garg inequality with weak measurements of photons

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Title Violation of the Leggett–Garg inequality with weak measurements of photons
Author Goggin, M. E.; Almeida, M. P.; Barbieri, M.; Lanyon, B. P.; O'Brien, J. L.; White, A. G.; Pryde, Geoff
Journal Name Proceedings of National Academy of Sciences
Year Published 2011
Place of publication United States
Publisher National Academy of Sciences
Abstract By weakly measuring the polarization of a photon between two strong polarization measurements, we experimentally investigate the correlation between the appearance of anomalous values in quantum weak measurements and the violation of realism and nonintrusiveness of measurements. A quantitative formulation of the latter concept is expressed in terms of a Leggett–Garg inequality for the outcomes of subsequent measurements of an individual quantum system. We experimentally violate the Leggett–Garg inequality for several measurement strengths. Furthermore, we experimentally demonstrate that there is a one-to-one correlation between achieving strange weak values and violating the Leggett–Garg inequality.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1073/pnas.1005774108
Copyright Statement Copyright 2011 National Academy of Sciences. 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 108
Issue Number 4
Page from 1256
Page to 1261
ISSN 0027-8424
Date Accessioned 2011-07-09
Date Available 2011-10-04T07:17:20Z
Language en_AU
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/10072/41081
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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