Observing quench dynamics in a 2D optical quasicrystal

The long-range ordered yet non-periodic structure of quasicrystals provides an intriguing testing ground for disorder-based phenomena with ultracold bosons: whilst long-range order allows for easy coherence detection using time-of-flight imaging and precludes rare regions, their quasi-disordered nature allows for studies of localization phenomena and other disorder-induced effects. Here we discuss the dynamics of ultracold bosons in a two-dimensional optical quasicrystal following a sudden quench across the superfluid-Bose glass phase transition. We observe oscillatory dynamics after quenches in both directions, and investigate how their time scales rely on the dominant terms of the underlying Hamiltonian. From here, we study the dynamics of correlations after the quench, and how they spread or decay depending on the nature of the final system, and compare our results to theoretical predictions from a tight binding simulation.