Comment on "Non-monotonic projection probabilities as a function of   distinguishability"
  A recent work (2014 New J. Phys. 16 013006) claims that nonmonotonic structures found in the many-particle quantum-to-classical transition (2013 Proc. Natl Acad. Sci. USA 110 1227-1231; 2011 Phys. Rev. A 83 062111) are not exclusive to the many-body domain, but they also appear for single-photon as well as for semi-classical systems. We show that these situations, however, do not incorporate any quantum-to-classical transition, which makes the claims unsustainable. 
Young-Sik Ra, Malte C. Tichy, Hyang-Tag Lim, Osung Kwon, Florian   Mintert, Andreas Buchleitner, Yoon-Ho Kim
quant-ph