VIGRE Research Focus Group on Spectral Properties of Random Operators

Co-organizers: Sasha Soshnikov and Robert Sims

Organizational Meeting: Thursday, October 5th, 5:10 p.m.

Room/Time of the Meetings: Wednesdays, 12:30-2:00p.m., 3106 MSB

The activities of this research group will be concentrated around the following three research areas:

a) random matrices and random point processes, in particular universality in random matrix ensembles, spectral properties of random graphs, general theory of determinantal (pfaffian) random point processes.

b) spectral properties of random and quasi-periodic Schrodinger operators.

c) trace ideals, Fredholm determinants, and their applications.

The suggested research topics are among the most rapidly developing and exciting areas in probability and mathematical physics. In addition we plan to discuss several topics in statistical mechanics, free probability, and Markov chains, such as dynamics of magnetic structures modeled by quantum spin systems, applications of recent developments in free probability (Guionnet, Haagerup, Voiculescu) to ``classical'' random matrix theory, and mixing times of Markov chains. The proposed activities have firm foundations in the areas of strength of the participating faculty members. The involved graduate students will be afforded an excellent opportunity not only to deepen the understanding of their area of thesis research, but also to learn about new problems, methods and results in the adjacent areas of mathematical physics and probability. The proposed research topics allow the active participation of undergraduate students who can explore the subject by analyzing the simplest models or by computer simulation. The activities of the RFG will be centered around a 1 1/2 hour informal weekly reading seminar. One of the main goals of the reading seminar will be to stimulate ongoing research and to formulate the new interesting problems. We will have several visitors who are experts in the proposed areas of research (Alexei Borodin, David Damanik, Ioana Dumitriu, Alice Guionnet, Gunter Stolz, Dmitry Jakobson, Iosif Polterovich, Simone Warzel). We expect that each visitor will give a review talk as well as a seminar talk on their current research.

Topics of the Weekly Meetings

Fall 2006 Quarter

October 12: Gaussian Unitary Ensemble. Joint Distribution of the Eigenvalues (Sasha Soshnikov).

October 19: Gaussian Unitary Ensemble. Point Correlation Functions (Sasha Soshnikov).

October 26: Orthogonal Polynomials and Jacobi Opertaors. Spectral Mapping (Sasha Soshnikov).

November 2: Wigner Random Matrices. Semicircle Law (Sandrine Peche).

November 9: Limiting Spectral Density in Unitary Ensembles of Random Matrices (Sasha Soshnikov).

November 16: Euler-Lagrange Variational Equations (Sasha Soshnikov).

November 30: Random Matrices and Integrable Systems (Igor Rumanov) .

December 7: Random Matrices and Integrable Systems (Igor Rumanov, continued).

Winter 2007 Quarter


January 10: Random Schrodinger Operators and Anderson Localization (Robert Sims).

January 17: Random Schrodinger Operators and Anderson Localization (Robert Sims, continued).

January 24: Resolvent Method in Random Matrix Theory I (Sasha Soshnikov).

Second part of the lecture.

February 7: Resolvent Method in Random Matrix Theory II.

Second part of the lecture.

February 14: Resolvent Method in Random Matrix Theory III.

February 21: On the largest eigenvalue of a random Wigner matrix (Sasha Soshnikov).

February 28: On the fluctuation of the eigenvalues in random matrices I (Sasha Soshnikov).

March 7: On the fluctuation of the eigenvalues in random matrices II.

March 14: On the fluctuation of the eigenvalues in random matrices III.