Quantum simulations with bilayer 2D Bose gases in multiple-RF-dressed potentials.

Multiple-RF (MRF) dressing allows trapping of ultracold atoms in novel spatial geometries, such as highly controllable bilayer structures for two-dimensional (2D) ultracold gases, providing unique opportunities for the investigation of 2D quantum systems both in and out of equilibrium. Here, we give an overview of the recent developments of MRF-dressed atom experiments, illustrated by the detailed studies of universal relaxation dynamics across the Berezinskii–Kosterlitz–Thouless critical point enabled by coherent splitting quench protocols and detection of correlations via spatially selective matter-wave interferometry. [ABSTRACT FROM AUTHOR]