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Q: Fachverband Quantenoptik und Photonik

Q 43: Ultracold Matter (Bosons) III (joint session Q/A)

Q 43.1: Vortrag

Mittwoch, 12. März 2025, 14:30–14:45, WP-HS

Out of equilibrium superfluid density evolution of dipolar Bose-Einstein condensate in ramped up disorder — •Rodrigo P A Lima^1,2, Milan Radonjić^3,4, and Axel Pelster⁵ — ¹Universidad de Castilla-La Mancha, Spain — ²Universidade Federal de Alagoas, Brazil — ³Universität Hamburg, Germany — ⁴University of Belgrade, Serbia — ⁵Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Germany

We study the evolution of the superfluid density of an ultracold Bose gas in a ramped-up weak random potential. The bosons are assumed to interact not only through an isotropic short-range contact interaction [1], but also through an anisotropic long-range dipole-dipole interaction. We determine the disorder ensemble averaged components of the superfluid density parallel and perpendicular to the dipole direction. In particular, we discuss how their reversible and irreversible contributions depend on both the dipolar interaction strength and the ramp-up time.

[1] M. Radonjić and A. Pelster, SciPost Phys. 10, 008 (2021).

Keywords: Superfluid density; Dipole-dipole interaction; Dirty Bosons; ramped-up weak disorder