标题： 几乎平衡弱值计量技术的实用优势 显示英文标题

标题： Practical Advantages of Almost-Balanced-Weak-Values Metrological Techniques

摘要： 使用两种不同的弱值技术对迈克尔逊干涉仪中一个镜子的超小线速度进行精确测量。我们表明，几乎平衡弱值（ABWV）技术相比弱值放大（WVA）技术具有实际优势， resulting in 更大的信噪比，并且由于对缓慢漂移的鲁棒性，可以实现更长的积分时间。作为ABWV协议性能的一个例子，我们报告了在40小时积分时间后的速度灵敏度为60 fm/s。由于移动镜子引起的多普勒频移的灵敏度为150 nHz。 显示英文摘要

摘要： Precision measurements of ultra-small linear velocities of one of the mirrors in a Michelson interferometer are performed using two different weak-values techniques. We show that the technique of Almost-Balanced Weak Values (ABWV) offers practical advantages over the technique of Weak-Value Amplification (WVA), resulting in larger signal-to-noise ratios and the possibility of longer integration times due to robustness to slow drifts. As an example of the performance of the ABWV protocol we report a velocity sensitivity of 60 fm/s after 40 hours of integration time. The sensitivity of the Doppler shift due to the moving mirror is of 150 nHz.