论文标题
观察辐射扭矩的射击噪声
Observation of radiation torque shot noise on an optically levitated nanodumbbell
论文作者
论文摘要
根据量子理论，测量和背部是密不可分的。在光学位置测量值中，此背部被称为辐射压力射击噪声。类似于机械转子的方向的测量必须通过辐射扭矩射击噪声干扰其角动量。在这项工作中，我们观察到在测量光悬浮的纳米贝尔的角方向时产生的射击扭矩波动。我们反馈冷却哑铃的旋转运动，并在从反馈中释放出来时调查其再加热行为。在高真空中，由于辐射扭矩射击噪声引起的加热速率在系统中的热和技术加热速率上占主导地位。
According to quantum theory, measurement and backaction are inextricably linked. In optical position measurements, this backaction is known as radiation pressure shot noise. In analogy, a measurement of the orientation of a mechanical rotor must disturb its angular momentum by radiation torque shot noise. In this work, we observe the shot-noise torque fluctuations arising in a measurement of the angular orientation of an optically levitated nanodumbbell. We feedback cool the dumbbell's rotational motion and investigate its reheating behavior when released from feedback. In high vacuum, the heating rate due to radiation torque shot noise dominates over the thermal and technical heating rates in the system.
