标题： 激光冷却微机械膜至量子反作用极限 显示英文标题

标题： Laser cooling of a micromechanical membrane to the quantum backaction limit

摘要： 光的辐射压力可以用来阻尼和冷却机械谐振器的振动运动。 在理解这种冷却的量子极限时，必须考虑散粒噪声波动对最终热占据的影响。 在腔内光学机械边带冷却中，由腔线宽定义的有限斯托克斯拉曼散射与散粒噪声波动相结合，决定了一个量子反作用极限，类似于原子激光冷却的多普勒极限。 在我们的工作中，我们通过使用在稀释冰箱中预冷的微机械膜来实现边带冷却至量子反作用极限。 监测光学边带使我们能够直接观察机械物体与光学浴达到热平衡。 显示英文摘要

摘要： The radiation pressure of light can act to damp and cool the vibrational motion of a mechanical resonator. In understanding the quantum limits of this cooling, one must consider the effect of shot noise fluctuations on the final thermal occupation. In optomechanical sideband cooling in a cavity, the finite Stokes Raman scattering defined by the cavity linewidth combined with shot noise fluctuations dictates a quantum backaction limit, analogous to the Doppler limit of atomic laser cooling. In our work we sideband cool to the quantum backaction limit by using a micromechanical membrane precooled in a dilution refrigerator. Monitoring the optical sidebands allows us to directly observe the mechanical object come to thermal equilibrium with the optical bath.