标题： 高-Q摆热涨落的直接测量 显示英文标题

标题： Direct Measurement of Thermal Fluctuation of High-Q Pendulum

摘要： 我们首次在非共振区域使用激光干涉引力波探测器直接测量了摆的热涨落。 这些测量结果在过去十年中得到了理论预测的良好验证，该理论预测是通过涨落-耗散定理得出的。 热涨落主要由线圈-磁铁执行器电路中的电阻贡献所主导。 当我们调节这些电阻时，噪声谱也根据理论预测发生了变化。 测量得到的热噪声水平对应于摆的高品质因数，约为10^5。 显示英文摘要

摘要： We achieved for the first time a direct measurement of the thermal fluctuation of a pendulum in an off-resonant region using a laser interferometric gravitational wave detector. These measurements have been well identified for over one decade by an agreement with a theoretical prediction, which was derived by a fluctuation-dissipation theorem. Thermal fluctuation is dominated by the contribution of resistances in coil-magnet actuator circuits. When we tuned these resistances, the noise spectrum also changed according to a theoretical prediction. The measured thermal noise level corresponds to a high quality factor on the order of 10^5 of the pendulum.