Observing the loss and revival of long-range phase coherence through disorder quenches.

ABSTRACT: Relaxation of quantum systems is a central problem in nonequilibrium physics. In contrast to classical systems, the underlying quantum dynamics results not only from atomic interactions but also from the long-range coherence of the many-body wave function. Experimentally, nonequilibrium states of quantum fluids are usually created using moving objects or laser potentials, directly perturbing and detecting the system's density. However, the fate of long-range phase coherence for hydrodynamic motion of disordered quantum systems is less explored, especially in three dimensions. Here, we unravel how the density and phase coherence of a Bose-Einstein condensate of ⁶Li₂ molecules respond upon quenching on or off an optical speckle potential. We find that, as the disorder i

SUBMITTER: Nagler B 

PROVIDER: S-EPMC8740730 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature