1205.2207 (Tabish Qureshi)

Quantum Version of Complementarity: A Duality Relation    [PDF]

Tabish Qureshi

Some recent works have introduced a modified concept of complementarity, exemplified by a setup in which the which-way detector is in a superposition of being present and absent. It has been argued that such experiments allow measurement of particle-like and wave-like behavior at the same time. Here we derive an inequality involving the visibility of interference and which-way information in the context of such modified experiments. We argue that in such experiments, a single detection can give information only about either wave-aspect or particle aspect, and Bohr's complementarity is fully respected.

View original: http://arxiv.org/abs/1205.2207