Phys. Rev. Lett. 91, 037901 (2003) [4 pages]Information-Theoretic Approach to Single-Particle and Two-Particle Interference in Multipath InterferometersReceived 18 February 2003; published 17 July 2003 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 multipath 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. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.037901
DOI:
10.1103/PhysRevLett.91.037901
PACS:
03.67.Mn, 07.60.Ly
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