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A Brownian-Motion Model for the Eigenvalues of a Random Matrix

Dyson, Freeman J.·1962·Journal of Mathematical Physics

Abstract

A new type of Coulomb gas is defined, consisting of n point charges executing Brownian motions under the influence of their mutual electrostatic repulsions. It is proved that this gas gives an exact mathematical description of the behavior of the eigenvalues of an (n × n) Hermitian matrix, when the elements of the matrix execute independent Brownian motions without mutual interaction. By a suitable choice of initial conditions, the Brownian motion leads to an ensemble of random matrices which is a good statistical model for the Hamiltonian of a complex system possessing approximate conservation laws. The development with time of the Coulomb gas represents the statistical behavior of the eigenvalues of a complex system as the strength of conservation-destroying interactions is gradually increased. A ``virial theorem'' is proved for the Brownian-motion gas, and various properties of the stationary Coulomb gas are deduced as corollaries.

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Metadata

Authors
Dyson, F. J.
Venue
Journal of Mathematical Physics
Published
1962-11-01
Volume
3
Issue
6
Pages
1191-1198
ISSN
  • 0022-2488 (ISSN-L)
  • 1089-7658
OpenAlex
W1988076732
Cited by
1,046
References
8
FWCI
4.83
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: A Brownian-Motion Model for the Eigenvalues of a Random Matrix. https://app.cochat.ai/papers/10.1063/1.1703862
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Dyson, F. J. (1962). A Brownian-Motion Model for the Eigenvalues of a Random Matrix. Journal of Mathematical Physics. https://doi.org/10.1063/1.1703862

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