量子信息交叉中心学术报告028
Title: Few body physics with K BEC
Speaker: Xin Xie(谢欣)
Place: RM 101，Bulg. 2，Xixi Campus (西溪校区西二楼101室)
Date and time: 10：00，Sep 26th，2019 （9月26日周四上午10：00）
Abstract：We developed a potassium 39 machine and achieved degenerate Bose gas with all-optical trapping in 2017 in JILA. With well-controlled density and temperature, we perform a series of experiments on few-body physics. We calibrate a Feshbach resonance by rf dissociation method with unprecedented precision. We locate a triatomic scattering resonance (Efimov resonance) at negative scattering lengths that substantially deviates from the van der Waals universal value. Ab inito models have been implemented to reproduce both results. We also extend this study to positive scattering lengths in a very recent experiment.
Biography：2013-present Graduate research, JILA and CU Boulder.
Specialization in experimental AMO physics, Bose-Einstein condensate, ultracold atoms, few- and many-body interactions, supervised by Prof. Deborah Jin (2013-2016), Prof. Jun Ye (2016-present), and Prof. Eric Cornell (2013-present) .
2009-2013 Undergraduate training, Fudan University, Shanghai.
Specialization in experimental condensed matter physics, angle-resolved photoemission spectroscopy, superconducting thin-fifilm materials, supervised by Prof. Donglai Feng.