提高未来双压缩输入引力波探测器的灵敏度
Increasing the sensitivity of future gravitational-wave detectors with double squeezed-input
摘要：
我们考虑通过将两个压缩真空（光）同时注入到干涉仪的暗端口中来提高未来干涉型引力波探测器的灵敏度。与作者之一先前建议的附加零差检测一起，允许在整个检测频带上减少量子噪声。为了激励未来的实现，我们考虑到先进LIGO（AdvLIGO）的现实的技术噪声预算和数值优化的滤波器和干涉仪的参数检测引力波信号从两个重要的天体物理学来源，即中子星-中子星（NSNS）的二进制文件和突发。假设30 m滤波腔的光损耗为10 ppm/次反射和10 dB的压缩注入，在最佳参数下，相应的量子噪声在高频处降低了10倍，在低频和中频处低于技术噪声。
英文摘要：
We consider improving the sensitivity of future interferometric gravitational-wave detectors by simultaneously injecting two squeezed vacuums (light), filtered through a resonant Fabry-Perot cavity, into the dark port of the interferometer.The same scheme with single squeezed vacuum was first proposed and analyzed by Corbitt et al. Here we show that the extra squeezed vacuum, together with an additional homodyne detection suggested previously by one of the authors, allows reduction of quantum noise over the entire detection band. To motivate future implementations, we take into account a realistic technical noise budget for Advanced LIGO (AdvLIGO) and numerically optimize the parameters of both the filter and the interferometer for detecting gravitational-wave signals from two important astrophysics sources, namely Neutron-Star--Neutron-Star (NSNS) binaries and Bursts. Assuming the optical loss of the 30m filter cavity to be 10ppm per bounce and 10dB squeezing injection, the corresponding quantum noise with optimal parameters lowers by a factor of 10 at high frequencies and goes below the technical noise at low and intermediate frequencies.
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