Scale-invariant dynamics of a planar Bose gas : dynamical symmetry, solitons and breathers.
Jérôme Beugnon (LKB)
Online seminar — ZOOM Meeting ID: 913 5556 5450 — Password: 966156 —
Low temperature quasi-2D Bose gases feature an approximate scale invariance. I will discuss several consequences of this scale-invariance on the equilibrium and dynamics of the gas and illustrate them through experiments with box-trapped ultracold atoms. I will first present experimental signatures of the SO(2,1) dynamical symmetry. In a two-component gas, I will report the observation of two-dimensional scale-invariant solitons, the so-called Townes solitons. Finally, I will show the surprising existence of breathers that might be related to the scale-invariance of the gas.