Frictionless flow in a binary polariton superfluid

Details Frictionless flow in a binary polariton superfluid Frictionless flow in a binary polariton superfluid

2011-07-22

arxiv.org/abs/1107.4522v2

Phys. Rev. Lett. 108, 065301 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 4 figures, 4 pages of supplementary material

Scientific paper

10.1103/PhysRevLett.108.065301

We study the properties of a binary microcavity polariton superfluid coherently injected by two lasers. The crossover from the supersonic to subsonic regime, where motion is frictionless, is described by evaluating the Bogoliubov spectra. We show that according to the Landau criteria, the coupling between the two components precludes the existence of superfluidity just for one component but not for the other. By analysing the drag force exerted on a defect, we give a recipe to experimentally address the crossover from the supersonic to the subsonic regime.

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