Coherent Cancellation of Backaction Noise in optomechanical Force Measurements
Coherent Cancellation of Backaction Noise in optomechanical Force Measurements
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DOI：
10.1103/physreva.89.053836
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发表时间：
2014-03
影响因子：
2.9
通讯作者：
M. Wimmer;D. Steinmeyer;K. Hammerer;M. Heurs
中科院分区：
文献类型：
--
作者：
M. Wimmer;D. Steinmeyer;K. Hammerer;M. Heurs
光机械探测器已经达到了位置和力传感的标准量子极限，其中测量反作用噪声开始成为灵敏度的限制因素。M. Tsang和C.物理学中的洞穴。105 123601（2010）。我们提供了这种方法的详细分析，并评估其优点，要求和局限性。我们的结论是，基于微光学机械系统的原理证明演示是苛刻的，但可能的。然而，对于与引力波探测器相关的参数，反作用规避的要求似乎是禁止的。
Optomechanical detectors have reached the standard quantum limit in position and force sensing where measurement backaction noise starts to be the limiting factor for the sensitivity. A strategy to circumvent measurement backaction, and surpass the standard quantum limit, has been suggested by M. Tsang and C. Caves in Phys. Rev. Lett. 105 123601 (2010). We provide a detailed analysis of this method and assess its benefits, requirements, and limitations. We conclude that a proof-of-principle demonstration based on a micro-optomechanical system is demanding, but possible. However, for parameters relevant to gravitational wave detectors the requirements for backaction evasion appear to be prohibitive.