Momentum transfer for momentum transfer-free which-path experiments
Aurélien Drezet, Andreas Hohenau, Joachim R. Krenn · Physical Review A · 2006
We analyze the origin of interference disappearance in which-path double-aperture experiments. We show that we can unambiguously define an observable momentum transfer between the quantum particle and the path detector and we prove in particular that the so-called ``momentum transfer free'' experiments can be, in fact, logically interpreted in term of momentum transfer.