Matthew
Edmonds
University of Queensland
Quantum liquid-like states of matter have been realized in an ongoing series of experiments with ultracold Bose gases. In this talk, using a combination of analytical and numerical approaches we identify the specific criteria for the existence of dark soliton-like excitations in beyond-mean-field condensate mixtures, revealing how these states exist for both repulsive and attractive interactions, the latter leading to dark quantum droplets with properties intermediate between a dark soliton and a quantum droplet. The dark quantum droplet's physical characteristics are also investigated, including calculation of the integrals of motion, revealing their sensitive dependence on physical parameters relevant to the current generation of experiments with quantum gases in the beyond-mean-field limit.
