论文标题
在光学晶格中，在基态附近的单纳米颗粒的反冲限制反馈冷却
Recoil-limited feedback cooling of single nanoparticles near the ground state in an optical lattice
论文作者
论文摘要
我们报告了光学晶格中单纳米颗粒的直接反馈冷却至其运动基态。我们发现激光相噪声会触发沿光学晶格的纳米颗粒运动的严重加热。当激光相通过数量级降低激光相时，加热速率会降低，因此，职业数量降低到大约三个。我们建立了一个直接连接加热速率和测量激光相噪声的模型，并阐明系统中最低激光相噪声下的职业数仅受光子后坐力加热的限制。我们的结果表明，在纳米颗粒的振荡频率附近的激光相噪声的降低对于将其带到基态附近，并为敏感的加速度计和量子机械实验铺平了至关重要的途径。
We report on direct feedback cooling of single nanoparticles in an optical lattice to near their motional ground state. We find that the laser phase noise triggers severe heating of nanoparticles' motion along the optical lattice. When the laser phase noise is decreased by orders of magnitude, the heating rate is reduced and accordingly the occupation number is lowered to about three. We establish a model directly connecting the heating rate and the measured laser phase noise and elucidates that the occupation number under the lowest laser phase noise in our system is limited only by photon recoil heating. Our results show that the reduction of the laser phase noise near the oscillation frequency of nanoparticles is crucial for bringing them near the ground state and pave the way to sensitive accelerometers and quantum mechanical experiments with ultracold nanoparticles in an optical lattice.
