Measuring small longitudinal phase shifts: weak measurements or standard interferometry?

@article{Brunner2010MeasuringSL,
  title={Measuring small longitudinal phase shifts: weak measurements or standard interferometry?},
  author={Nicolas Brunner and Christoph Simon},
  journal={Physical review letters},
  year={2010},
  volume={105 1},
  pages={010405}
}
Recently, weak measurements were used to measure small effects that are transverse to the propagation direction of a light beam. Here we address the question of whether weak measurements are also useful for measuring small longitudinal phase shifts. We show that standard interferometry greatly outperforms weak measurements in a scenario involving a purely real weak value. However, we also present an interferometric scheme based on a purely imaginary weak value, combined with a frequency-domain… CONTINUE READING