Resonant enhancement of particle emission from a parametrically driven condensate in a one-dimensional lattice

Motivated by recent experiments, we investigate particle emission from a Bose-Einstein condensate in a one-dimensional lattice, where the interaction strength is periodically modulated. The modulated interactions parametrically excite a collective mode, leading to density oscillations. These collective oscillations in turn drive particle emission. This multistep process amplifies the drive, producing larger particle jets. We find that the amplitude dependence of the emission rate has a characteristic threshold behavior, as seen in experiments.

Automated summary

Motivated by recent experiments, the study investigates particle emission from a Bose-Einstein condensate in a one-dimensional lattice with periodically modulated interaction strength. The modulated interactions excite a collective mode and lead to density oscillations, which in turn drive particle emission. The study finds that the emission rate shows a characteristic threshold behavior based on the amplitude dependence, consistent with experimental observations.