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.
| Original language | English |
|---|---|
| Pages (from-to) | 1256-1261 |
| Number of pages | 6 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Volume | 108 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 25 Jan 2011 |
| Externally published | Yes |
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Goggin, M. E., Almeida, M. P., Barbieri, M., Lanyon, B. P., O'Brien, J. L., White, A. G., & Pryde, G. J. (2011). Violation of the Leggett-garg inequality with weak measurements of photons. Proceedings of the National Academy of Sciences of the United States of America, 108(4), 1256-1261. https://doi.org/10.1073/pnas.1005774108