Supermatrix models, loop equations, and duality

Details Supermatrix models, loop equations, and duality Supermatrix models, loop equations, and duality

2009-11-09

arxiv.org/abs/0911.1762v1

Physics

Mathematical Physics

27 pages, 9 figures, ams latex

Scientific paper

We study integrals over Hermitian supermatrices of arbitrary size $p+q$, that are parametrized by an external field $X$ and a source $Y$, of respective size $m+n$ and $p+q$. We show that these integrals exhibit a simple topological expansion in powers of a formal parameter $\hbar$, which can be identified with $1/(p-q)$. The loop equation and the associated spectral curve are also obtained. The solutions to the loop equation are given in terms of the symplectic invariants introduced in arXiv:math-ph/0702045. The symmetry property of the latter objects allows us to prove a duality that relates supermatrix models in which the role of $X$ and $Y$ are interchanged.

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