标题： 强相互作用费希巴赫分子玻色-爱因斯坦凝聚体中的散射晕 显示英文标题

标题： Scattering halos in strongly interacting Feshbach molecular Bose-Einstein condensates

摘要： 我们研究了相互作用可调的$^6\rm Li_2$分子玻色-爱因斯坦凝聚体在飞行时间膨胀中离散动量组分碰撞产生的散射晕。 本研究的一个重点是观察相互作用对碰撞散射过程的影响。 我们通过改变粒子数和散射长度，在不同相互作用水平下测量散射晕的产生，并定量评估微扰理论的适用性。 为了深入探讨散射晕的一般理论，我们引入了一个散射因子，并得到了该因子与晕比之间的普遍关系。 此外，我们在非微扰条件下模拟了散射晕的形成，并通过回波脉冲实验分析了模拟结果与实验之间的差异。 这项研究增强了我们对多体系统中散射过程物理机制的理解，并为进一步的理论研究提供了新的视角。 显示英文摘要

摘要： We investigate the scattering halos resulting from collisions between discrete momentum components in the time-of-flight expansion of interaction-tunable $^6\rm Li_2$ molecular Bose-Einstein condensates. A key highlight of this study is the observation of the influence of interactions on the collisional scattering process. We measure the production of scattering halos at different interaction levels by varying the number of particles and the scattering length, and quantitatively assess the applicability of perturbation theory. To delve into a general theory of scattering halos, we introduce a scattering factor and obtain a universal relation between it and the halo ratio. Furthermore, we simulate the formation of scattering halos under non-perturbative conditions and analyze the discrepancies between simulation results and experiments through a return pulse experiment. This study enhances our understanding of the physical mechanisms underlying scattering processes in many-body systems and provides new perspectives for further theoretical research.