Complementarity via error-free measurement in a two-path interferometer
Yanjun Liu, Jing Lu, Lan Zhou · Laser Physics Letters · 2017
Abstract We study both wave-like behavior and particle-like behavior in a general Mach–Zehnder interferometer with an asymmetric beam splitter. An error-free measurement in the detector is used to extract the which-path information. The fringe visibility V and the which-path information I path are derived, their complementary relation V + I p a t h ⩽ 1 is found, and the condition for the equality is also presented.