Ku Mark J H, Ji Wenjie, Mukherjee Biswaroop, Guardado-Sanchez Elmer, Cheuk Lawrence W, Yefsah Tarik, Zwierlein Martin W
MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Phys Rev Lett. 2014 Aug 8;113(6):065301. doi: 10.1103/PhysRevLett.113.065301. Epub 2014 Aug 4.
We observe a long-lived solitary wave in a superfluid Fermi gas of (6)Li atoms after phase imprinting. Tomographic imaging reveals the excitation to be a solitonic vortex, oriented transverse to the long axis of the cigar-shaped atom cloud. The precessional motion of the vortex is directly observed, and its period is measured as a function of the chemical potential in the BEC-BCS crossover. The long period and the correspondingly large ratio of the inertial to the bare mass of the vortex are in good agreement with estimates based on superfluid hydrodynamics that we derive here using the known equation of state in the BEC-BCS crossover.
在对（6）Li原子的超流费米气体进行相位印记后，我们观测到了一个长寿命孤波。断层成像显示该激发为一个孤子涡旋，其方向垂直于雪茄形原子云的长轴。我们直接观测到了涡旋的进动运动，并测量了其周期作为玻色-爱因斯坦凝聚-玻色-库珀对超流转变（BEC-BCS crossover）中化学势的函数。涡旋的长周期以及相应的大惯性质量与裸质量之比，与我们在此使用BEC-BCS转变中的已知状态方程推导得出的基于超流流体动力学的估计结果高度吻合。
Zotero 插件