引力波探测器在挤压下表现更佳

IF 12.9 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2024-10-10 DOI:10.1038/s41550-024-02400-x

Bishwanath Gaire

引用次数: 0

摘要

激光干涉仪引力波天文台（LIGO）等引力波探测器对时空位移的微小变化非常敏感。在最近的一项研究中，Wenxuan Jia 及其同事表明，通过使用与频率无关的挤压真空态和滤波器腔体，可以在一定频率范围内将 LIGO 探测器的噪声水平降低到低于标准量子极限 (SQL) 3 分贝的水平。作者将量子挤压态与失谐和过耦合法布里-佩罗腔相结合，将频率无关态从挤压态转换为频率相关态，从而在更宽的频率范围内降低了噪声。这些挤压态（或非经典光态）代表了光子对之间具有相关性的光量子态。在这些状态下，有可能降低一种形式的噪声（不精确噪声），而牺牲另一种形式的噪声（量子反作用噪声），达到海森堡不确定性原理所允许的极限。这两种噪声是共轭变量，因此在精确测量另一种噪声时，一种噪声的不确定性会增加。作者使用的滤波腔根据挤压态的频率旋转挤压态，从而降低了噪声。他们在分析中将非挤压态的测量结果与挤压态的测量结果相减，结果清楚地表明，挤压量子噪声在 35 至 75 Hz 之间超过 SQL 最多 3 dB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Gravitational-wave detectors perform better with squeezing

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

19.50

自引率

2.80%

发文量

252

期刊介绍： Nature Astronomy, the oldest science, has played a significant role in the history of Nature. Throughout the years, pioneering discoveries such as the first quasar, exoplanet, and understanding of spiral nebulae have been reported in the journal. With the introduction of Nature Astronomy, the field now receives expanded coverage, welcoming research in astronomy, astrophysics, and planetary science. The primary objective is to encourage closer collaboration among researchers in these related areas. Similar to other journals under the Nature brand, Nature Astronomy boasts a devoted team of professional editors, ensuring fairness and rigorous peer-review processes. The journal maintains high standards in copy-editing and production, ensuring timely publication and editorial independence. In addition to original research, Nature Astronomy publishes a wide range of content, including Comments, Reviews, News and Views, Features, and Correspondence. This diverse collection covers various disciplines within astronomy and includes contributions from a diverse range of voices.