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71 papers
Large anomalous shifts of potassium-39 Feshbach resonances
Ali Zaheer, Mohammed Bouras, Krzysztof Giergiel +3
We report the observation of large anomalous shifts, up to +7.5 G, of the positions of the 33.6 G and 39.9 G Feshbach resonances in potassium-39 atoms confined in a 1063.9 nm optic…
Mediated interactions between Fermi polarons and the role of impurity quantum statistics
Cosetta Baroni, Bo Huang, Isabella Fritsche +7
The notion of quasi-particles is essential for understanding the behaviour of complex many-body systems. A prototypical example of a quasi-particle, a polaron, is an impurity stron…
Comprehensive characterization of an apparatus for cold electromagnetic dysprosium dipoles
Gregor Anich, Niclas Höllrigl, Marian Kreyer +2
We report on the development of an advanced ultracold dysprosium apparatus, which incorporates a cold atom microscope (CAM) with a design resolution of a quarter micrometer. The CA…
Optically trapped Feshbach molecules of fermionic 161Dy and 40K
E. Soave, A. Canali, Zhu-Xiong Ye +3
We report on the preparation of a pure ultracold sample of bosonic DyK Feshbach molecules, which are composed of the fermionic isotopes 161Dy and 40K. Employing a magnetic sweep ac…
Low-field Feshbach resonances and three-body losses in a fermionic quantum gas of Dy
Elisa Soave, Vincent Corre, Cornelis Ravensbergen +4
We report on high-resolution Feshbach spectroscopy on a degenerate, spin-polarized Fermi gas of Dy atoms, measuring three-body recombination losses at low magnetic field. F…
Measurement of the dynamic polarizability of Dy atoms near the 626-nm intercombination line
Marian Kreyer, Jeong Ho Han, Cornelis Ravensbergen +4
We report on measurements of the anisotropic dynamical polarizability of Dy near the 626-nm intercombination line, employing modulation spectroscopy in a one-dimensional optical la…