Comment on ‘Non-monotonic projection probabilities as a function of distinguishability’

Abstract

A recent work (Björk and Shabbir 2014 New J. Phys. http://dx.doi.org/10.1088/1367-2630/16/1/013006 16 http://dx.doi.org/10.1088/1367-2630/16/1/013006 ) claims that nonmonotonic structures found in the many-particle quantum-to-classical transition (Ra et al 2013 Proc. Natl Acad. Sci. USA http://dx.doi.org/10.1073/pnas.1206910110 110 http://dx.doi.org/10.1073/pnas.1206910110 ; Tichy et al 2011 Phys. Rev. A http://dx.doi.org/10.1103/PhysRevA.83.062111 83 http://dx.doi.org/10.1103/PhysRevA.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.

Keywords

• quantum-to-classical transition
• nonmonotonic transition
• multi-photon interference