Relations between coherence and path information
Abstract
We find two relations between coherence and path-information in a multi-path interferometer. The first builds on earlier results for the two-path interferometer, which used minimum-error state discrimination between detector states to provide the path information. For visibility, which was used in the two-path case, we substitute a recently defined measure of quantum coherence. The second is an entropic relation in which the path information is characterized by the mutual information between the detector states and the outcome of the measurement performed on them, and the coherence measure is one based on relative entropy.
Keywords
Cite
@article{arxiv.1509.04592,
title = {Relations between coherence and path information},
author = {Emilio Bagan and Janos A. Bergou and Seth S. Cottrell and Mark Hillery},
journal= {arXiv preprint arXiv:1509.04592},
year = {2016}
}
Comments
The original result has been strengthened, an entropic duality relation has been added, and an author has been added. The title has also been modified