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在室温下测量音频频段中的量子反作用
Jonathan Cripe1, Nancy Aggarwal2, Robert Lanza2
1Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA, USA. jcripe1@lsu.edu.
Nature
|March 27, 2019
概括
我们首次在室温下测量量子辐射压力噪声 (QRPN). 这种噪音限制了未来的引力波探测器,
科学领域:
- 量子力学
- 引力波天文学
- 实验物理
背景情况:
- 量子力学通过海森堡不确定性原理对测量精度设定了基本限制.
- 在干涉波引力波探测器中,增加激光功率以减少射击噪声会放大量子辐射压力噪声 (QRPN).
- QRPN是LIGO,Virgo和KAGRA等先进探测器在特定频段的关键限制因素.
研究的目的:
- 介绍QRPN在室温下的第一个实验宽带测量.
- 建立一个测试平台来评估旨在减轻QRPN和量子反作用的技术.
- 验证与未来引力波探测器灵敏度相关的QRPN理论模型.
主要方法:
- 在室温下测量量子辐射压力噪声 (QRPN).
- 在重力波探测器 (2 kHz至100 kHz) 相关的频率范围内对噪声谱的描述.
- 实验结果与QRPN大小的理论预测进行比较.
主要成果:
- 在室温下成功测量宽带QRPN.
- 在大约2kHz和100kHz之间观察到QRPN效应.
- 实验中的QRPN大小与理论模型的预测非常相符.
结论:
- 开发的平台可以实验研究QRPN和量子反作用缓解策略.
- 这项工作对于提高未来引力波探测器的灵敏度至关重要.
- 像变量读数和压缩光注射这样的技术现在可以进行实验测试.
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