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arXiv · 1803.10676

Dysprosium dipolar Bose-Einstein condensate with broad Feshbach resonances

E. Lucioni·L. Tanzi·A. Fregosi·J. Catani·S. Gozzini·M. Inguscio·A. Fioretti·C. Gabbanini·G. Modugno
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Abstract

We produce Bose-Einstein condensates of $^{162}$Dy atoms employing an innovative technique based on a resonator-enhanced optical trap that allows efficient loading from the magneto-optical trap and fast evaporation. We characterize the scattering properties of the ultracold atoms for magnetic fields between 6 and 30 G. In addition to the typical chaotic distribution of narrow Feshbach resonances in Lanthanides, we discover two rather isolated broad features at around 22 G and 27 G. A characterization using the complementary measurements of losses, thermalization, anisotropic expansion and molecular binding energy points towards resonances of predominant s-wave character. Such resonances will ease the investigation of quantum phenomena relying on the interplay between dipole and contact interactions.

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E. Lucioni, L. Tanzi, A. Fregosi, J. Catani, S. Gozzini, M. Inguscio, A. Fioretti, C. Gabbanini, G. Modugno. 2019-01-09. Dysprosium dipolar Bose-Einstein condensate with broad Feshbach resonances. https://doi.org/10.1103/physreva.97.060701

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