Quantum noise in laser-interferometer gravitational-wave detectors with a heterodyne readout scheme
Quantum noise in laser-interferometer gravitational-wave detectors with a heterodyne readout scheme
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DOI：
10.1103/physrevd.67.122005
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发表时间：
2003-02
影响因子：
5
通讯作者：
A. Buonanno;Yanbei Chen;N. Mavalvala
中科院分区：
文献类型：
--
作者：
A. Buonanno;Yanbei Chen;N. Mavalvala
我们分析和讨论的量子噪声信号回收激光干涉引力波探测器，如先进的LIGO，使用外差读出方案，并考虑到光机动力学。与零差检测相反，外差读出方案可以同时测量输出场的一个以上正交，提供优化干涉仪灵敏度的附加方式，但以附加噪声为代价。我们的分析提供了所需的框架，以评估零差或外差读出方案是更理想的第二代干涉仪从天体物理的角度来看。作为一个更理论的结果，我们的分析，我们表明，由于海森堡不确定性原理的外差计划不能将传统的干涉仪（宽带）量子非爆破干涉仪。
We analyze and discuss the quantum noise in signal-recycled laser interferometer gravitational-wave detectors, such as Advanced LIGO, using a heterodyne readout scheme and taking into account the optomechanical dynamics. Contrary to homodyne detection, a heterodyne readout scheme can simultaneously measure more than one quadrature of the output field, providing an additional way of optimizing the interferometer sensitivity, but at the price of additional noise. Our analysis provides the framework needed to evaluate whether a homodyne or heterodyne readout scheme is more optimal for second generation interferometers from an astrophysical point of view. As a more theoretical outcome of our analysis, we show that as a consequence of the Heisenberg uncertainty principle the heterodyne scheme cannot convert conventional interferometers into (broadband) quantum non-demolition interferometers.