论文标题
光学涡流束的横向动量的相干转移向单个捕获离子的运动
Coherent transfer of the transverse momentum of an optical vortex beam to the motion of a single trapped ion
论文作者
论文摘要
我们使用携带轨道角动量的结构光束向横向运动的质量运动中心进行刺激，以横向向光束传播的质量运动中心。这种相互作用是用一个涡旋梁携带一个单位轨道角动量和一个单位自旋/极化角动量的涡流束实现的。 Using a singly charged $^{40}$Ca$^+$ ion, cooled near the ground state of motion in the 3D harmonic potential of a Paul trap, we probe the narrow S$_{1/2}$ to D$_{5/2}$ transition near $729\,\mathrm{nm}$ on its motional sidebands to quantify the momentum transfer.在涡旋形状的梁上观察到垂直方向上的量子沿垂直方向交换，与高斯梁的情况不存在这种自旋运动偶联，观察到了涡旋形状的束。我们通过有效的横向羔羊dicke因子$η^\ mathrm {exp} _ {\ perp} = 0.0062（5）$来表征连贯的互动，这与我们的理论预测$η^\ mathrm {theo}
We demonstrate the excitation, using a structured light beam carrying orbital angular momentum, of the center of mass motion of a single atom in the transverse direction to the beam's propagation. This interaction is achieved with a vortex beam carrying one unit of orbital angular momentum and one unit of spin/polarization angular momentum. Using a singly charged $^{40}$Ca$^+$ ion, cooled near the ground state of motion in the 3D harmonic potential of a Paul trap, we probe the narrow S$_{1/2}$ to D$_{5/2}$ transition near $729\,\mathrm{nm}$ on its motional sidebands to quantify the momentum transfer. Exchange of quanta in the perpendicular direction to the beam's wave vector $\mathbf{k}$ is observed in case of the vortex shaped beam, in strong contrast to the absence of this spin-motion coupling for the case of a Gaussian beam. We characterize the coherent interaction by an effective transverse Lamb-Dicke factor $η^\mathrm{exp}_{\perp}=0.0062(5)$ which is in agreement with our theoretical prediction $η^\mathrm{theo}_{\perp}=0.0057(1)$
