用全息产生的光束在玻色-爱因斯坦凝聚体中诱导涡旋
Inducing vortices in a Bose-Einstein condensate using holographically produced light beams
摘要：
在本文中，我们展示了一种技术，可以创建一个玻色-爱因斯坦凝聚体的平衡涡旋配置几乎任意的电荷和几何形状。我们利用双光子受激拉曼过程，将全息产生的光束的轨道角动量相干转移到铷87凝聚体上。利用物质波干涉技术，我们验证了单个涡旋和涡旋-反涡旋对的原子波函数上的相位图案。除了它们的相位缠绕之外，用这种技术产生的涡旋具有相关的超精细自旋纹理。
英文摘要：
In this paper we demonstrate a technique that can create out-of-equilibrium vortex configurations with almost arbitrary charge and geometry in a Bose-Einstein condensate. We coherently transfer orbital angular momentum from a holographically generated light beam to a Rubidium 87 condensate using a two-photon stimulated Raman process. Using matter wave interferometry, we verify the phase pattern imprinted onto the atomic wave function for a single vortex and a vortex-antivortex pair. In addition to their phase winding, the vortices created with this technique have an associated hyperfine spin texture.
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