Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 25: Quantum Gases (Fermions) I
Q 25.7: Vortrag
Montag, 5. März 2018, 17:45–18:00, K 1.022
Spinor Gases of Fermionic Erbium Atoms — •Jan Hendrik Becher1,3, Simon Baier1, Lauriane Chomaz1,2, Gabriele Natale1, Daniel Petter1, Manfred Mark1,2, and Francesca Ferlaino1,2 — 1Institut für Experimentalphysik, Universität Innsbruck, Austria — 2Institut für Quantenoptik und Quanteninformation, Innsbruck, Austria — 3Physikalisches Institut, Heidelberg University, Germany
Over the last decade, dipolar quantum gases have become an ideal system to study novel phenomena in ultracold quantum physics. In particular, strongly magnetic atomic species, such as erbium, open fascinating possibilities to investigate dipole-dipole interaction (DDI) and its impact on few- and many-body effects in ultracold spinor gases.
Here we report on first experimental investigations of spin physics in fermionic erbium, 167Er. Due to its large quantum numbers, fermionic erbium has a remarkably large number of spin states in the lowest level manifold, F = 19/2. The 20 different mF states interact via both contact and DDI. The DDI is violating spin conservation and effects the dynamics of out-of-equilibrium spin systems.
In the experiment, we create a spin polarized, degenerate Fermi gas in the absolute lowest Zeeman sublevel. We then load the atomic sample into a 3D optical lattice and start spin preparation by applying a radio frequency pulse. In this setting, we study the interaction in the proximity of homonuclear p-wave Feshbach resonances and discover new interspin Feshbach resonances. Furthermore we investigate the dynamics of spin excitations in the frozen-particle regime.