Scientists measure atomic nudge

At 174 trillionths of a trillionth of a newton, new 'yoctoforce' is smallest yet measured.

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Biercuk, M. J., Uys, H., Britton, J. W., VanDevender, A. P. & Bollingerz, J. J. Preprint available at arxiv.org/abs/1004.0780v2 (2010).
Teufel, J. D., Donner, T., Castellanos-Beltran, M. A., Harlow, J. W. & Lehnert, K. W. Nature Nanotechnol. 4, 820-823 (2009).
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Geoff Brumfiel
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Brumfiel, G. Scientists measure atomic nudge. Nature (2010). https://doi.org/10.1038/news.2010.187