Limiting statistics of the largest and smallest eigenvalues in the correlated Wishart model

Wirtz T, Kieburg M, Guhr T (2015)
EPL (Europhysics Letters) 109(2): 20005.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
The correlated Wishart model provides a standard tool for the analysis of correlations in a rich variety of systems. Although much is known for complex correlation matrices, the empirically much more important real case still poses substantial challenges. We put forward a new approach, which maps arbitrary statistical quantities, depending on invariants only, to invariant Hermitian matrix models. For completeness we also include the quaternion case and deal with all three cases in a unified way. As an important application, we study the statistics of the largest eigenvalue and its limiting distributions in the correlated Wishart model, because they help to estimate the behavior of large complex systems. We show that even for fully correlated Wishart ensembles, the Tracy-Widom distribution can be the limiting distribution of the largest as well as the smallest eigenvalue, provided that a certain scaling of the empirical eigenvalues holds. Copyright (C) EPLA, 2015
Erscheinungsjahr
Zeitschriftentitel
EPL (Europhysics Letters)
Band
109
Zeitschriftennummer
2
Artikelnummer
20005
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Wirtz T, Kieburg M, Guhr T. Limiting statistics of the largest and smallest eigenvalues in the correlated Wishart model. EPL (Europhysics Letters). 2015;109(2): 20005.
Wirtz, T., Kieburg, M., & Guhr, T. (2015). Limiting statistics of the largest and smallest eigenvalues in the correlated Wishart model. EPL (Europhysics Letters), 109(2), 20005. doi:10.1209/0295-5075/109/20005
Wirtz, T., Kieburg, M., and Guhr, T. (2015). Limiting statistics of the largest and smallest eigenvalues in the correlated Wishart model. EPL (Europhysics Letters) 109:20005.
Wirtz, T., Kieburg, M., & Guhr, T., 2015. Limiting statistics of the largest and smallest eigenvalues in the correlated Wishart model. EPL (Europhysics Letters), 109(2): 20005.
T. Wirtz, M. Kieburg, and T. Guhr, “Limiting statistics of the largest and smallest eigenvalues in the correlated Wishart model”, EPL (Europhysics Letters), vol. 109, 2015, : 20005.
Wirtz, T., Kieburg, M., Guhr, T.: Limiting statistics of the largest and smallest eigenvalues in the correlated Wishart model. EPL (Europhysics Letters). 109, : 20005 (2015).
Wirtz, Tim, Kieburg, Mario, and Guhr, Thomas. “Limiting statistics of the largest and smallest eigenvalues in the correlated Wishart model”. EPL (Europhysics Letters) 109.2 (2015): 20005.