A generalized plasma and interpolation between classical random matrix ensembles

Details A generalized plasma and interpolation between classical random matrix ensembles A generalized plasma and interpolation between classical random matrix ensembles

2010-12-02

arxiv.org/abs/1012.0597v1

Physics

Mathematical Physics

21 pages

Scientific paper

The eigenvalue probability density functions of the classical random matrix ensembles have a well known analogy with the one component log-gas at the special couplings \beta = 1,2 and 4. It has been known for some time that there is an exactly solvable two-component log-potential plasma which interpolates between the \beta =1 and 4 circular ensemble, and an exactly solvable two-component generalized plasma which interpolates between \beta = 2 and 4 circular ensemble. We extend known exact results relating to the latter --- for the free energy and one and two-point correlations --- by giving the general (k_1+k_2)-point correlation function in a Pfaffian form. Crucial to our working is an identity which expresses the Vandermonde determinant in terms of a Pfaffian. The exact evaluation of the general correlation is used to exhibit a perfect screening sum rule.

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