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Journal Articles Proceedings of the National Academy of Sciences of the United States of America Year : 2011

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

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.
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Dates and versions

hal-00623095 , version 1 (13-09-2011)

Identifiers

  • HAL Id : hal-00623095 , version 1

Cite

Michael E. Goggin, Marcelo P. Almeida, Marco Barbieri, Benjamin P. Lanyon, Jeremy L. O'Brien, et al.. Violation of the Leggett-Garg inequality with weak measurements of photons. Proceedings of the National Academy of Sciences of the United States of America, 2011, 108 (4), pp.1256-1261. ⟨hal-00623095⟩
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