Observation of von K\'arm\'an Vortex Street in an Atomic Superfluid Gas

22 Oct 2016 Kwon Woo Jin Kim Joon Hyun Seo Sang Won Shin Yong-il

We report on the experimental observation of vortex cluster shedding from a moving obstacle in an oblate atomic Bose-Einstein condensate. At low obstacle velocities $v$ above a critical value, vortex clusters consisting of two like-sign vortices are generated to form a regular configuration like a von K\'arm\'an street, and as $v$ is increased, the shedding pattern becomes irregular with many different kinds of vortex clusters... (read more)

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