Information theoretic approach to single-particle and two-particle interference in multi-path interferometers

Details Information theoretic approach to single-particle and two-particle interference in multi-path interferometers Information theoretic approach to single-particle and two-particle interference in multi-path interferometers

2003-02-19

arxiv.org/abs/quant-ph/0302140v1

Physics

Quantum Physics

RevTex 4, 4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.91.037901

We propose entropic measures for the strength of single-particle and two-particle interference in interferometric experiments where each particle of a pair traverses a multi-path interferometer. Optimal single-particle interference excludes any two-particle interference, and vice versa. We report an inequality that states the compromises allowed by quantum mechanics in intermediate situations, and identify a class of two-particle states for which the upper bound is reached. Our approach is applicable to symmetric two-partite systems of any finite dimension.

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