Abstract
Two interferometric complementarities are formulated and demonstrated, and relations between them are analyzed. The first relates the distinguishability D(scrP) of the path of propagation of a particle (where scrP is the preparation of an ensemble) to the fringe visibility when amplitudes from two paths are combined. It is shown that [maxD(scrP)+=1, where the maximum is taken over all preparations compatible with a fixed density operator. The second complementarity relates the visibility of one-particle interference fringes to the visibility of two-particle fringes: +≤1. With a suitable extension of operations on the pair of particles, this inequality is strengthened to an equality.
- Received 1 August 1994
DOI:https://doi.org/10.1103/PhysRevA.51.54
©1995 American Physical Society