Weak-values technique for velocity measurements

作者：Viza Gerardo I^*; Martinez Rincon Julian; Howland Gregory A; Frostig Hadas; Shomroni Itay; Dayan Barak; Howell John C

来源：Optics Letters, 2013, 38(16): 2949-2952.

DOI：10.1364/OL.38.002949

In a recent Letter, Brunner and Simon proposed an interferometric scheme using imaginary weak values with a frequency-domain analysis to outperform standard interferometry in longitudinal phase shifts [Phys. Rev. Lett 105, 010405 (2010)]. Here we demonstrate an interferometric scheme combined with a time-domain analysis to measure longitudinal velocities. The technique employs the near-destructive interference of non-Fourier limited pulses, one Doppler shifted due to a moving mirror in a Michelson interferometer. We achieve a velocity measurement of 400 fm/s and show our estimator to be efficient by reaching its Cramer-Rao bound.

• 出版日期2013-8-15