Family of solvable generalized random-matrix ensembles with unitary symmetry

Details Family of solvable generalized random-matrix ensembles with unitary symmetry Family of solvable generalized random-matrix ensembles with unitary symmetry

2005-04-04

arxiv.org/abs/cond-mat/0504081v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, to be published in Phys. Rev. E, Rapid Comm

Scientific paper

10.1103/PhysRevE.71.055101

We construct a very general family of characteristic functions describing Random Matrix Ensembles (RME) having a global unitary invariance, and containing an arbitrary, one-variable probability measure which we characterize by a `spread function'. Various choices of the spread function lead to a variety of possible generalized RMEs, which show deviations from the well-known Gaussian RME originally proposed by Wigner. We obtain the correlation functions of such generalized ensembles exactly, and show examples of how particular choices of the spread function can describe ensembles with arbitrary eigenvalue densities as well as critical ensembles with multifractality.

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