Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 24: Poster II
Q 24.13: Poster
Tuesday, March 12, 2024, 17:00–19:00, KG I Foyer
Pattern formation in dipolar quantum gases — •Andreea-Maria Oros1, Niklas Rasch1, Wyatt Kirkby1,2, Lauriane Chomaz2, and Thomas Gasenzer1,3 — 1Kirchhoff-Institut für Physik, Universität Heidelberg, Im Neuenheimer Feld 227 — 2Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226 — 3Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16
Ultracold dipolar gases have garnered increasing interest over the past years. The anisotropic and long-range character of the dipolar interaction and the stabilizing nature of LHY corrections give rise to supersolidity, superglasses, and exotic states of matter. Different supersolid ground states, such as triangular, honeycomb, or even labyrinthine ones, were already theoretically predicted, depending on the atom number, scattering length, and trapping frequency. Our work expands on these phases by considering the out-of-equilibrium dynamics of a harmonically trapped, three-dimensional dipolar condensate. Following a quench in the scattering length across a phase transition boundary, we investigate the dynamical formation of supersolids, including those exhibiting novel crystalline structures. We further search for far-from-equilibrium phenomena, e.g., non-thermal fixed points, self-similar scaling, and the spontaneous formation of vortices in the pattern-forming regime. At the moment, quenches into the triangular and stripe phases have proven to be successful and promise insights into new physics, where time oscillations akin to a quadrupole mode of the droplets have been observed.
Keywords: dipolar gases; supersolid; quench; pattern formation; far-from-equilibrium dynamics