Year: 2025
Type: article
Abstract: We investigate the scattering halos resulting from collisions between discrete momentum components in the time-of-flight expansion of interaction-tunable $^{6}\mathrm{Li}_{2}$ 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 nonperturbative conditions and discuss the contribution of in-trap dynamics to the scattering halos 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.
Source: Physical Review A
Authors: Yuying Chen, Zhengxi Zhang, Chi-Kin Lai, Yun Liang, Hongmian Shui, Haixiang Fu, Fansu Wei, Xiaoji Zhou
Institutions: Shanxi University, Peking University, Huaqiao University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4409131589