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Limit Operators for Circular Ensembles

In: Frontiers in Analysis and Probability

Author

Listed:
  • Kenneth Maples

    (Universität Zürich, Institut für Mathematik)

  • Joseph Najnudel

    (University of Bristol, School of Mathematics)

  • Ashkan Nikeghbali

    (Universität Zürich, Institut für Mathematik)

Abstract

It is known that a unitary matrix can be decomposed into a product of reflections, one for each dimension, and that the Haar measure on the unitary group pushes forward to independent uniform measures on the reflections. We consider the sequence of unitary matrices given by successive products of random reflections. In this coupling, we show that powers of the sequence of matrices converge in a suitable sense to a flow of operators, which acts on a random vector space. The vector space has an explicit description as a subspace of the space of sequences of complex numbers. The eigenvalues of the matrices converge almost surely to the eigenvalues of the flow, which are distributed in law according to a sine-kernel point process. The eigenvectors of the matrices converge almost surely to vectors, which are distributed in law as Gaussian random fields on a countable set.

Suggested Citation

  • Kenneth Maples & Joseph Najnudel & Ashkan Nikeghbali, 2020. "Limit Operators for Circular Ensembles," Springer Books, in: Nalini Anantharaman & Ashkan Nikeghbali & Michael Th. Rassias (ed.), Frontiers in Analysis and Probability, pages 327-369, Springer.
    • Handle: RePEc:spr:sprchp:978-3-030-56409-4_8
    DOI: 10.1007/978-3-030-56409-4_8
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