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arXiv · 1703.01632

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

Julián Martínez-Rincón·Zekai Chen·John C. Howell
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Abstract

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.

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Julián Martínez-Rincón, Zekai Chen, John C. Howell. 2017-05-14. Practical Advantages of Almost-Balanced-Weak-Values Metrological Techniques. https://doi.org/10.1103/physreva.95.063804

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