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Experimental Observation of the Drag Force Suppression in a Flow of Superfluid Light

Abstract : We report a direct experimental detection of the frictional-superfluid transition in the flow of a fluid of light past a weakly perturbing localized obstacle in a bulk nonlinear crystal. In our cavityless all-optical system, we extract on the one hand a direct optical analog of the drag force experienced by the obstacle and measure on the other hand the associated obstacle displacement. We observe a superfluid regime characterized by a suppression of long-range radiation from the obstacle, which is, as expected, associated to the cancellation of the drag force and the absence of displacement of the obstacle.
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https://hal.univ-cotedazur.fr/hal-01613733
Contributor : Claire Michel <>
Submitted on : Tuesday, October 10, 2017 - 9:26:51 AM
Last modification on : Thursday, March 26, 2020 - 9:46:14 PM
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Claire Michel, Omar Boughdad, Mathias Albert, Pierre-Élie Larré, Matthieu Bellec. Experimental Observation of the Drag Force Suppression in a Flow of Superfluid Light. 2017. ⟨hal-01613733⟩

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