光机系统辐射压散粒噪声的可观测性
Observability of radiation pressure shot noise in optomechanical systems
摘要：
我们提出了一个理论研究的实验设计，以检测辐射压力散粒噪声的光机系统。我们的模型包括一个相干驱动的光学腔模式，耦合到一个机械振荡器。我们研究了腔体输出场的两个正交项之间的互相关。我们确定在何种情况下，辐射压力散粒噪声可以通过测量这种互相关检测。这是在驱动频率和腔谐振频率之间的非零失谐的一般情况下完成的。我们研究了互相关器的不同贡献的定性特征，并提供了辐射压力散粒噪声贡献对其他贡献的相对重要性的定量品质因数。我们还提出了一个修改后的设置，这个实验相关的“膜在中间”的几何形状，这可能可以避免的问题，静态双稳态和经典噪声的驱动器。
英文摘要：
We present a theoretical study of an experiment designed to detect radiation pressure shot noise in an optomechanical system. Our model consists of a coherently driven optical cavity mode that is coupled to a mechanical oscillator. We examine the cross-correlation between two quadratures of the output field from the cavity. We determine under which circumstances radiation pressure shot noise can be detected by a measurement of this cross-correlation. This is done in the general case of nonzero detuning between the frequency of the drive and the cavity resonance frequency. We study the qualitative features of the different contributions to the cross-correlator and provide quantitative figures of merit for the relative importance of the radiation pressure shot noise contribution to other contributions. We also propose a modified setup of this experiment relevant to the "membrane-in-the-middle" geometry, which potentially can avoid the problems of static bistability and classical noise in the drive.
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