Quantum noise of non-ideal Sagnac speed meter interferometer with asymmetries
Quantum noise of non-ideal Sagnac speed meter interferometer with asymmetries
复制标题
不对称非理想Sagnac速度计干涉仪的量子噪声
DOI：
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
S. Hild
中科院分区：
文献类型：
--
作者：
S. Danilishin;C. Gräf;S. Leavey;J. Hennig;E. Houston;D. Pascucci;S. Steinlechner;J. Wright;S. Hild
速度计的概念已被确定为一种技术，可以潜在地提供激光干涉测量的灵敏度超过标准量子限制（SQL）在一个广泛的频率范围。与其他子SQL测量技术一样，损耗在速度计干涉仪中起着核心作用，它们最终决定了可以实现的量子噪声限制灵敏度。到目前为止，在文献中，量子噪声限制的灵敏度只推导出无损或有损的情况下使用某些近似（例如，臂腔往返损耗是小的相比，臂腔镜传输）。在这篇文章中，我们提出了一个广义的，分析处理的速度计的损失，允许准确计算的量子噪声限制的灵敏度Sagnac速度计与臂腔。此外，我们的分析使我们能够考虑到潜在的缺陷，如一个不对称的分束器或两臂腔输入镜的反射率的差异的干涉仪。最后，我们使用的例子证明的概念Sagnac速度计目前正在建设中的格拉斯哥和一个潜在的实施Sagnac速度计在爱因斯坦望远镜，以说明我们的研究结果如何影响Sagnac速度计米和米长的基线。
The speed meter concept has been identified as a technique that can potentially provide laser-interferometric measurements at a sensitivity level which surpasses the standard quantum limit (SQL) over a broad frequency range. As with other sub-SQL measurement techniques, losses play a central role in speed meter interferometers and they ultimately determine the quantum noise limited sensitivity that can be achieved. So far in the literature, the quantum noise limited sensitivity has only been derived for lossless or lossy cases using certain approximations (for instance that the arm cavity round trip loss is small compared to the arm cavity mirror transmission). In this article we present a generalized, analytical treatment of losses in speed meters that allows accurate calculation of the quantum noise limited sensitivity of Sagnac speed meters with arm cavities. In addition, our analysis allows us to take into account potential imperfections in the interferometer such as an asymmetric beam splitter or differences of the reflectivities of the two arm cavity input mirrors. Finally, we use the examples of the proof-of-concept Sagnac speed meter currently under construction in Glasgow and a potential implementation of a Sagnac speed meter in the Einstein Telescope to illustrate how our findings affect Sagnac speed meters with metre- and kilometre-long baselines.
用于爱因斯坦望远镜的具有直流读数的真实偏振萨尼亚克拓扑
影响因子：
5
作者：
Wang M
通讯作者：
Wang M