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Secular determinants of random unitary matrices. (English) Zbl 0899.15013

Summary: 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.

MSC:

15B52 Random matrices (algebraic aspects)
15A15 Determinants, permanents, traces, other special matrix functions
15A90 Applications of matrix theory to physics (MSC2000)
82B10 Quantum equilibrium statistical mechanics (general)
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