论文标题
具有吸引人种间相互作用的退化CS-YB混合物的动力学
Dynamics of a degenerate Cs-Yb mixture with attractive interspecies interactions
论文作者
论文摘要
我们探究了CS的量子变性Bose-Bose混合物和$^{174} $ YB的集体动力学，并具有吸引人的种间相互作用。具体而言，我们激发了CS冷凝物的质量振荡的垂直中心，并且由于能量快速传递到较大的YB成分以及随之而来的声学耗散，观察到CS偶极模式的显着阻尼。基于耦合的GROSS-PITAEVSKII方程的数值模拟提供了极好的一致性，并揭示了人们发现对CS和YB原子数组合高度敏感的后期复兴（跳动）的可能性。通过使用广泛的feshbach共振进一步调整CS的相互作用强度，我们探索了堕胎混合物的稳定性，并观察到当$ a _ {\ a {\ mathrm {cs}}}} <50 \ 50 \，a_0 $ a_0 $ a _ a_0 $，及其超过单个splysepe coldess的CS-yb相互作用介导的CS凝结物的崩溃。
We probe the collective dynamics of a quantum degenerate Bose-Bose mixture of Cs and $^{174}$Yb with attractive interspecies interactions. Specifically, we excite vertical center of mass oscillations of the Cs condensate, and observe significant damping for the Cs dipole mode, due to the rapid transfer of energy to the larger Yb component, and the ensuing acoustic dissipation. Numerical simulations based on coupled Gross-Pitaevskii equations provide excellent agreement, and additionally reveal the possibility of late-time revivals (beating) which are found to be highly sensitive to the Cs and Yb atom number combinations. By further tuning the interaction strength of Cs using a broad Feshbach resonance, we explore the stability of the degenerate mixture, and observe collapse of the Cs condensate mediated by the attractive Cs-Yb interaction when $a_{\mathrm{Cs}}<50 \, a_0$, well above the single-species collapse threshold, in good agreement with simulations.
