论文标题
用荧光在量子水平上测量离子振荡
Measuring ion oscillations at the quantum level with fluorescence light
论文作者
论文摘要
我们展示了一种光学方法，用于检测具有单子敏感性的原子的机械振荡。测量信号是由于单个被困原子离子散射的光与其镜像图像散布的光之间的干扰。原子的运动调节干扰路径长度，从而调节光子检测率。我们检测到多普勒冷却极限中原子的振荡，并在相空间中重建平均轨迹。我们证明了EIT冷却后在运动基底状态附近表现出的单音灵敏度。这些结果可用于运动检测其他基本兴趣的光散射器，例如被困的纳米颗粒。
We demonstrate an optical method for detecting the mechanical oscillations of an atom with single-phonon sensitivity. The measurement signal results from the interference between the light scattered by a single trapped atomic ion and that of its mirror image. The motion of the atom modulates the interference path length and hence the photon detection rate. We detect the oscillations of the atom in the Doppler cooling limit and reconstruct average trajectories in phase space. We demonstrate single-phonon sensitivity near the ground state of motion after EIT cooling. These results could be applied for motion detection of other light scatterers of fundamental interest, such as trapped nanoparticles.
