Mathematics – Probability
Scientific paper
2004-09-16
Probability Surveys 2004, Vol. 1, 72-172
Mathematics
Probability
Published at http://dx.doi.org/10.1214/154957804100000033 in the Probability Surveys (http://www.i-journals.org/ps/) by the In
Scientific paper
10.1214/154957804100000033
Large random matrices appear in different fields of mathematics and physics such as combinatorics, probability theory, statistics, operator theory, number theory, quantum field theory, string theory etc... In the last ten years, they attracted lots of interests, in particular due to a serie of mathematical breakthroughs allowing for instance a better understanding of local properties of their spectrum, answering universality questions, connecting these issues with growth processes etc. In this survey, we shall discuss the problem of the large deviations of the empirical measure of Gaussian random matrices, and more generally of the trace of words of independent Gaussian random matrices. We shall describe how such issues are motivated either in physics/combinatorics by the study of the so-called matrix models or in free probability by the definition of a non-commutative entropy. We shall show how classical large deviations techniques can be used in this context. These lecture notes are supposed to be accessible to non probabilists and non free-probabilists.
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