论文标题
标记的冷原子的几乎无损温度和在各向同性激光冷却中的应用
Nearly nondestructive thermometry of labeled cold atoms and application to isotropic laser cooling
论文作者
论文摘要
我们已经设计并实施了一种直接的方法，以确定性地测量冷原子合奏所选段的温度，并且我们还以无损温度计的形式开发了一种升级。本质是通过操纵内部状态标记靶向冷原子的热膨胀，而无损性能通过驱动循环过渡来依赖于几乎无损的检测。对于受到各向同性激光冷却的冷原子，该方法具有独特的能力，即仅处理外壳内的光学检测轴上的原子，这正是我们在原子钟或量子传感等主要应用中关心的部分。此外，我们的结果证实了各向同性激光冷却中的子多普勒冷却特征，我们已经研究了相关的冷却特性。同时，我们以空心束的形式采用了最近开发的光学构型，并以冷却激光注射的形式使用，这有助于增强冷却性能并在中央区域积累更多的冷原子。
We have designed and implemented a straightforward method to deterministically measure the temperature of the selected segment of a cold atom ensemble, and we have also developed an upgrade in the form of nondestructive thermometry. The essence is to monitor the thermal expansion of the targeted cold atoms after labeling them through manipulating the internal states, and the nondestructive property relies upon the nearly lossless detection via driving a cycling transition. For cold atoms subject to isotropic laser cooling, this method has the unique capability of addressing only the atoms on the optical detection axis within the enclosure, which is exactly the part we care about in major applications such as atomic clock or quantum sensing. Furthermore, our results confirm the sub-Doppler cooling features in isotropic laser cooling, and we have investigated the relevant cooling properties. Meanwhile, we have applied the recently developed optical configuration with the cooling laser injection in the form of hollow beams, which helps to enhance the cooling performance and accumulate more cold atoms in the central regions.
