Secular determinants of random unitary matrices

Details Secular determinants of random unitary matrices Secular determinants of random unitary matrices

1996-03-12

arxiv.org/abs/chao-dyn/9603006v1

J. Phys. A: Math. Gen. 29 (1996) 3641-3658

Physics

Condensed Matter

18 pages, LaTeX with iop style files (included) or revtex, 13 figures included using epsf and rotate, submitted to J. Phys. A

Scientific paper

10.1088/0305-4470/29/13/029

We consider the characteristic polynomials of random unitary matrices $U$ drawn from various circular ensembles. In particular, the statistics of the coefficients of these polynomials are studied. The variances of these ``secular coefficients'' are given explicitly for arbitrary dimension and continued analytically to arbitrary values of the level repulsion exponent $\beta$. The latter secular coefficients are related to the traces of powers of $U$ by Newton's well-known formulae. While the traces tend to have Gaussian distributions and to be statistically independent among one another in the limit as the matrix dimension grows large, the secular coefficients exhibit strong mutual correlations due to Newton's mixing of traces to coefficients. These results might become relevant for current efforts at combining semiclassics and random-matrix theory in quantum treatments of classically chaotic dynamics.

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