论文标题
首次演示6 dB量子降低降低以公里的比例引力波观测站
First demonstration of 6 dB quantum noise reduction in a kilometer scale gravitational wave observatory
论文作者
论文摘要
光子射击噪声是由光的量子力学性质引起的，目前限制了所有引力波观测值的灵敏度，以一千洛茨高于1千ohertz的频率。我们报告了在600天文台的地理上挤压真空状态的成功应用，并首次证明了在公里尺度干涉仪中首次将量子噪声降低到$ 6.03 \ pm 0.02 $ 0.02 $ db。这在高频率上是等效的，可以将干涉仪中的激光循环增加四倍。实现这一里程碑，这是升级高级探测器的关键目标，需要更好地了解噪声源和损失，并实施强大的控制方案以减轻其贡献。特别是，我们解决了光束传播，挤压椭圆的相位噪声以及挤压光源的反向散射光的光损失。从GEO 600进行的这项工作中获得的专业知识为实施第三代重力波探测器设想的10 dB挤压提供了洞察力。
Photon shot noise, arising from the quantum-mechanical nature of the light, currently limits the sensitivity of all the gravitational wave observatories at frequencies above one kilohertz. We report a successful application of squeezed vacuum states of light at the GEO\,600 observatory and demonstrate for the first time a reduction of quantum noise up to $6.03 \pm 0.02$ dB in a kilometer-scale interferometer. This is equivalent at high frequencies to increasing the laser power circulating in the interferometer by a factor of four. Achieving this milestone, a key goal for the upgrades of the advanced detectors, required a better understanding of the noise sources and losses, and implementation of robust control schemes to mitigate their contributions. In particular, we address the optical losses from beam propagation, phase noise from the squeezing ellipse, and backscattered light from the squeezed light source. The expertise gained from this work carried out at GEO 600 provides insight towards the implementation of 10 dB of squeezing envisioned for third-generation gravitational wave detectors.
