Affiliation:
1. School of Science Nanjing University of Posts and Telecommunications Nanjing 210023 China
2. School of Electronic Engineering Chengdu Technological University Chengdu 611730 China
3. School of Physics and Electronics Hunan University Changsha 410082 China
Abstract
AbstractParticle emission from a Bose‐Einstein condensate with periodically modulated interactions is investigated in a 1D lattice. Within perturbative analysis, which leads to instabilities for discrete modes, the main regimes are obtained where the system can emit a large particle jet, and the distinctly intermittent rather than continuous emission is found. The time evolution of the trapped particles exhibits a stair‐like decay, and a larger drive induces a more significant intermittency. This study further sheds light on the dynamics of the stimulating process, and demonstrates that instead of a real suspension, the intermittency represents a build‐up stage of the system. The theoretical framework might be generalized to the explorations on multiple‐site systems with analogous configurations and couplings, and offer new insights into other fundamental nonequilibrium problems.
Funder
China Scholarship Council
Natural Science Foundation of Sichuan Province
National Natural Science Foundation of China