Dysprosium dipolar Bose-Einstein condensate with broad Feshbach resonances

Year: 2018

Authors: Lucioni E., Tanzi L., Fregosi A., Catani J., Gozzini S., Inguscio M., Fioretti A., Gabbanini C., Modugno G.

Autors Affiliation: LENS and Dip. di Fisica e Astronomia, Università di Firenze, 50019 Sesto Fiorentino, Italy; CNR-INO, S.S. A. Gozzini di Pisa, via Moruzzi 1, 56124 Pisa, Italy; Dipartimento di Fisica, Università di Pisa, Largo B. Pontecorvo, 56127 Pisa, Italy;
CNR-INO, S.S. Sesto Fiorentino, 50019 Sesto Fiorentino, Italy

Abstract: We produce Bose-Einstein condensates of 162Dy atoms employing an innovative technique based on a resonator-enhanced optical trap that allows efficient loading from the magneto-optical trap. 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.

Journal/Review: PHYSICAL REVIEW A

Volume: 97 (6)      Pages from: 060701-1  to: 060701-5

More Information: We acknowledge support by L.A. Gizzi, the EC-H2020 research and innovation program (Grant No. 641122-QUIC), the ERC (Grants No. 203479-QUPOL and No. 247371-DISQUA), and the Italian MIUR (Grant No. PRIN2015 2015C5SEJJ). We also acknowledge discussions with A. Simoni and technical assistance by A. Barbini, F. Pardini, M. Tagliaferri, and M. Voliani.
KeyWords: dipolar quantum gases, Feshbach resonances
DOI: 10.1103/PhysRevA.97.060701

Citations: 24
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