两体和三体相互作用下的非线性Landau-Zener隧穿的圈结构研究

在加速光晶格中玻色-爱因斯坦凝聚体（BEC），当同时考虑两体和三体相互作用时，其能级结构、隧穿率出现了独特的特性.在一维加速光晶格中的BEC，当两体和三体相互作用参数满足一定条件时，非线性两能级体系的能级结构中出现了圈结构，研究得出了圈的宽度随两体和三体相互作用参数变化的关系，并由此分析圈结构的出现及其大小对BEC隧穿率的影响.

Research on Loop structure of Nonlinear Landau-Zener tunneling with two and three-body interactions

Bose-Einstein condensate (BEC) in an accelerating optical lattice has particular characteristic for energy structure and tunneling probability when both two and three-body interactions are taken into account. The loop structure and loop width of BEC with two and three-body interactions in a one-dimensional accelerating optical lattice are discussed. When the loop structure is excited, an analytical expression of the loop width is obtained. On the other hand, the influence of the loop width on the tunneling probability is discussed in detail.