The Institute of Optics, University of Rochester, Rochester, New York 14627, USA.
Phys Rev Lett. 2009 Dec 18;103(25):250401. doi: 10.1103/PhysRevLett.103.250401. Epub 2009 Dec 14.
We present the first experimental realization and characterization of two-dimensional Skyrmions and half-Skyrmions in a spin-2 Bose-Einstein condensate. The continuous rotation of the local spin of the Skyrmion through an angle of pi (and half-Skyrmion through an angle of pi/2) across the cloud is confirmed by the spatial distribution of the three spin states as parametrized by the bending angle of the l vector. The winding number w = (0,1,2) of the internal spin states comprising the Skyrmions is confirmed through matter-wave interference.
我们首次在二维自旋玻色-爱因斯坦凝聚中实验实现并表征了二维斯格明子和半斯格明子。通过 l 矢量弯曲角参数化的三个自旋态的空间分布，证实了斯格明子（以及半斯格明子）的局部自旋连续旋转π角（以及π/2 角）。通过物质波干涉，证实了构成斯格明子的内部自旋态的拓扑荷数 w = (0,1,2)。
