Raman fingerprints on the Bloch sphere of a spinor Bose–Einstein condensate
Raman fingerprints on the Bloch sphere of a spinor Bose–Einstein condensate
复制标题
旋量玻色-爱因斯坦凝聚的布洛赫球上的拉曼指纹
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
N. Bigelow
中科院分区：
文献类型：
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作者：
J. Schultz;A. Hansen;Joseph D. Murphree;M. Jayaseelan;N. Bigelow
我们探讨了赝自旋系统的非绝热双光子拉曼过程在布洛赫球上的旋转的几何解释。自旋量子系统的自旋状态可以用布洛赫球表面上的一个点来描述，它在拉曼脉冲期间的演化是由光束的性质决定的球上的轨迹：脉冲面积、相对强度和相位以及相对频率。我们实验证明了这个模型的关键功能与Rb旋量玻色-爱因斯坦凝聚，这使我们能够检查空间依赖的签名的拉曼光束。双光子失谐使我们能够精确地控制自旋密度和压印的相对相位分布，如我们所示的无核涡旋。有了这种全面的理解和直观的几何解释，我们使用拉曼过程来创建和定制，以及研究和表征奇异的自旋拓扑结构的旋量BEC。
We explore the geometric interpretation of a diabatic, two-photon Raman process as a rotation on the Bloch sphere for a pseudo-spin- system. The spin state of a spin- quantum system can be described by a point on the surface of the Bloch sphere, and its evolution during a Raman pulse is a trajectory on the sphere determined by properties of the optical beams: the pulse area, the relative intensities and phases and the relative frequencies. We experimentally demonstrate key features of this model with a Rb spinor Bose–Einstein condensate, which allows us to examine spatially dependent signatures of the Raman beams. The two-photon detuning allows us to precisely control the spin density and imprinted relative phase profiles, as we show with a coreless vortex. With this comprehensive understanding and intuitive geometric interpretation, we use the Raman process to create and tailor as well as study and characterize exotic topological spin textures in spinor BECs.
影响因子：
56.9
作者：
Romming, Niklas;Hanneken, Christian;Wiesendanger, Roland
通讯作者：
Wiesendanger, Roland