Combinatorial Models of Creation-Annihilation

Details Combinatorial Models of Creation-Annihilation Combinatorial Models of Creation-Annihilation

2010-10-02

arxiv.org/abs/1010.0354v3

Seminaire Lotharingien de Combinatoire 65, Art. B65c (2011)

Mathematics

Combinatorics

78 pages, 27 figures; Final version as published at "Seminaire Lotharingien de Combinatoire" 65, Art. B65c (2011)

Scientific paper

Quantum physics has revealed many interesting formal properties associated with the algebra of two operators, A and B, satisfying the partial commutation relation AB-BA=1. This study surveys the relationships between classical combinatorial structures and the reduction to normal form of operator polynomials in such an algebra. The connection is achieved through suitable labelled graphs, or "diagrams", that are composed of elementary "gates". In this way, many normal form evaluations can be systematically obtained, thanks to models that involve set partitions, permutations, increasing trees, as well as weighted lattice paths. Extensions to q-analogues, multivariate frameworks, and urn models are also briefly discussed.

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