Bose-Einstein Condensation of Europium

We report the realization of a Bose-Einstein condensate of europium atoms, which is a strongly dipolar species with unique properties, a highly symmetric [Xe]4f^{7}6s^{2} ^{8}S_{7/2} electronic ground state and a hyperfine structure. By means of evaporative cooling in a crossed optical dipole trap,...

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Bibliographic Details
Published in:Physical review letters 2022-11, Vol.129 (22), p.223401-223401, Article 223401
Main Authors: Miyazawa, Yuki, Inoue, Ryotaro, Matsui, Hiroki, Nomura, Gyohei, Kozuma, Mikio
Format: Article
Language:English
Subjects:
Cold Temperature
Europium
Optical Tweezers
Phase Transition
Vibration
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Summary:We report the realization of a Bose-Einstein condensate of europium atoms, which is a strongly dipolar species with unique properties, a highly symmetric [Xe]4f^{7}6s^{2} ^{8}S_{7/2} electronic ground state and a hyperfine structure. By means of evaporative cooling in a crossed optical dipole trap, we produce a condensate of ^{151}Eu containing up to 5×10^{4} atoms. We estimate the scattering length of ^{151}Eu to be a_{s}=110(4)  a_{B} after comparing the velocities of expansion of condensates to different orientations of the atomic magnetic moments, where a_{B} is the Bohr radius. We observe deformation of the condensate in the vicinity of the Feshbach resonance at 1.32 G with a width of 10 mG.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.129.223401