Measuring evolution of a photon in an interferometer with   spectrally-resolved modes
  In the year 2013, Danan et al. published a paper [Phys. Rev. Lett. 111, 240402 (2013)] demonstrating a counterintuitive behavior of photons in nested Mach-Zehnder interferometers. The authors then proposed an explanation based on the two-state vector formalism. This experiment and the authors' explanation raised a vivid debate within the scientific community. In this paper, we contribute to the ongoing debate by presenting an alternative experimental implementation of the Danan et al. scheme. We show that no counterintuitive behavior is observed when performing direct spectrally-resolved detection. 
Marek Bula, Karol Bartkiewicz, Anton\'in \v{C}ernoch, Dalibor   Jav\r{u}rek, Karel Lemr, V\'aclav Mich\'alek, and Jan Soubusta
quant-ph