基于微重力实验的机械参数反馈冷却
Mechanical parametric feedback-cooling for pendulum-based gravity experiments
摘要：
以音频频率振荡的引力是用悬挂的质量来测量的，这些质量的共振频率甚至更低。如果摆被热能或环境的地震运动激励，则测量灵敏度降低。传统上，这个问题是减轻地震隔离和线性阻尼，可能与低温冷却相结合。在这里，我们提出了机械参数冷却的钟摆运动在引力场测量。我们报告的证明，在地震噪声占主导地位的政权的原则演示，并实现了5.7的钟摆运动的阻尼因子。我们发现一个模型系统，机械参数反馈冷却达到量子力学制度附近的基态。我们预计在引力波探测器中会有更多可行的应用。
英文摘要：
Gravitational forces that oscillate at audio-band frequencies are measured with masses suspended as pendulums that have resonance frequencies even lower. If the pendulum is excited by thermal energy or by seismic motion of the environment, the measurement sensitivity is reduced. Conventionally, this problem is mitigated by seismic isolation and linear damping, potentially combined with cryogenic cooling. Here, we propose mechanical parametric cooling of the pendulum motion during the gravitational field measurement. We report a proof of principle demonstration in the seismic noise dominated regime and achieve a damping factor of the pendulum motion of 5.7. We find a model system for which mechanical parametric feedback cooling reaches the quantum mechanical regime near the ground state. More feasible applications we anticipate in gravitational-wave detectors.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
