Quench dynamics of disordered quadrupolar Bose-Einstein condensates

Abstract

We systematically investigate the equilibrium and the nonequilibrium quench dynamics of three-dimensional disordered quadrupolar Bose-Einstein condensates. Within the Bogoliubov-Huang-Meng approximation, we show that the combined effect of quenched interactions, disorder and excitations may modify the static as well as the dynamic properties of the system. The validity criterion of the developed approach is accurately established. By quenching the interaction strength, we reveal that the quantum depletion and the deformation condensate induced by disorder are enhanced in the asymptotic steady state compared to the corresponding equilibrium values. The time evolution of the condensate deformation is accompanied by damped oscillations with amplitudes strongly depend on the disorder correlation length and on the relative quadrupolar interaction.