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arXiv · 1705.02650

Relaxation dynamics in the merging of $N$ independent condensates

M. Aidelsburger·J. L. Ville·R. Saint-Jalm·S. Nascimbène·J. Dalibard·J. Beugnon
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Abstract

Controlled quantum systems such as ultracold atoms can provide powerful platforms to study non-equilibrium dynamics of closed many-body quantum systems, especially since a complete theoretical description is generally challenging. In this Letter, we present a detailed study of the rich out-of-equilibrium dynamics of an adjustable number $N$ of uncorrelated condensates after connecting them in a ring-shaped optical trap. We observe the formation of long-lived supercurrents and confirm the scaling of their winding number with $N$ in agreement with the geodesic rule. Moreover, we provide insight into the microscopic mechanism that underlies the smoothening of the phase profile.

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M. Aidelsburger, J. L. Ville, R. Saint-Jalm, S. Nascimbène, J. Dalibard, J. Beugnon. 2017-10-04. Relaxation dynamics in the merging of $N$ independent condensates. https://doi.org/10.1103/physrevlett.119.190403

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