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Liquid quantum droplets of ultracold magnetic atoms
Igor Ferrier-Barbut, Matthias Schmitt, Matthias Wenzel +2
The simultaneous presence of two competing inter-particle interactions can lead to the emergence of new phenomena in a many-body system. Among others, such effects are expected in…
Observation of quantum droplets in a strongly dipolar Bose gas
Igor Ferrier-Barbut, Holger Kadau, Matthias Schmitt +2
Quantum fluctuations are the origin of genuine quantum many-body effects, and can be neglected in classical mean-field phenomena. Here we report on the observation of stable quantu…
Condensing magnons in a degenerate ferromagnetic spinor Bose gas
Fang Fang, Ryan Olf, Shun Wu +2
We observe the condensation of magnon excitations within an Rb spinor Bose-Einstein condensed gas. Magnons are pumped into a longitudinally spin-polarized gas, allowed…
Observing the Rosensweig instability of a quantum ferrofluid
Holger Kadau, Matthias Schmitt, Matthias Wenzel +4
Ferrofluids show unusual hydrodynamic effects due to the magnetic nature of their constituents. For increasing magnetization a classical ferrofluid undergoes a Rosensweig instabili…
Emergence of chaotic scattering in ultracold Er and Dy
T. Maier, H. Kadau, M. Schmitt +13
We show that for ultracold magnetic lanthanide atoms chaotic scattering emerges due to a combination of anisotropic interaction potentials and Zeeman coupling under an external mag…
Broad universal Feshbach resonances in the chaotic spectrum of Dysprosium atoms
Thomas Maier, Igor Ferrier-Barbut, Holger Kadau +6
We report on the observation of weakly-bound dimers of bosonic Dysprosium with a strong universal s-wave halo character, associated with broad magnetic Feshbach resonances. These s…
Narrow-line magneto-optical trap for dysprosium atoms
T. Maier, H. Kadau, M. Schmitt +2
We present our technique to create a magneto-optical trap for dysprosium atoms using the narrow-line cooling transition at 626nm to achieve suitable conditions for direct loadi…
Confinement-induced collapse of a dipolar Bose-Einstein condensate
J. Billy, E. A. L. Henn, S. Müller +6
We report on the observation of the confinement-induced collapse dynamics of a dipolar Bose-Einstein condensate (dBEC) in a one-dimensional optical lattice. We show that for a fixe…
Dipolar Stabilization of an Attractive Bose Gas in a One Dimensional Lattice
S. Müller, J. Billy, E. A. L. Henn +5
We experimentally show that dipolar interaction can stabilize otherwise unstable many-body systems like an attractive Bose gas. In a one dimensional lattice the repulsive dipolar o…