Accelerate Bose–Einstein condensate by interaction<xref rid="cpb_28_12_126701fn1" ref-type="fn">*</xref><fn id="cpb_28_12_126701fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 11847059 and 11904063).</p></fn>

Accelerate Bose–Einstein condensate by interaction**

Project supported by the National Natural Science Foundation of China (Grant Nos. 11847059 and 11904063).

Qin Jie-Li^†

Speeding up of BEC wave packet broadening caused by interaction engineering. The solid line represents the FWHM of the wave packet under a timely constant repulsive interaction Ng(x) = 0.3(x + 10), while the dashed line represents the FWHM of the wave packet under a timely engineered interaction. The corresponding densities are shown in Figs. 2(a2) and 6(b).