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。

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来源期刊

Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

19.50

自引率

2.80%

发文量

252

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