New scaling of Itzykson-Zuber integrals |
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Authors: | Benoît Collins Piotr ?niady |
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Institution: | a Research Institute for Mathematical Sciences, Kyoto university, Kyoto 606-8502, Japan b Institute of Mathematics, University of Wroclaw, pl. Grunwaldzki 2/4, 50-384 Wroclaw, Poland |
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Abstract: | We study asymptotics of the Itzykson-Zuber integrals in the scaling when one of the matrices has a small rank compared to the full rank. We show that the result is basically the same as in the case when one of the matrices has a fixed rank. In this way we extend the recent results of Guionnet and Maïda who showed that for the fixed rank scaling, the Itzykson-Zuber integral is given in terms of the Voiculescu's R-transform of the full rank matrix. |
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Keywords: | 46L54 15A52 |
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