Effects of drive imbalance on the particle emission from a Bose-Einstein condensate in a one-dimensional lattice

Abstract

Abstract Time-periodic driving has been an effective tool in the field of nonequilibrium quantum dynamics, which enables precise control of the particle interactions. In this work, we investigate the collective emission of particles from a Bose-Einstein condensate in a one-dimensional lattice with periodic drives that are separate in modulation amplitudes and relative phases. In addition to the enhancement of particle emission, we find that amplitude imbalances lead to energy shift and band broadening, while typical relative phases may give rise to similar gaps. These results offer insights into the specific manipulations of nonequilibrium quantum systems with tone-varying drives.