21. Jan 2021
On the operator norm of a random matrix with a polynomially decaying metric correlation structure
MATHPHYS ANALYSIS SEMINAR
Datum: 21. January 2021 |
16:15 –
17:15
Sprecher:
Jana Reker, IST Austria
Veranstaltungsort: online via Zoom
In this talk, we consider a $N\timesN$ Hermitian random matrix with a polynomially decaying metric correlation structure.
Trivial a priori bound shows that the operator norm of this model is stochastically dominated by $\sqrt{N}$. However, by calculating the trace of the moments of the matrix and using the summable decay of the cumulants, the estimate on the norm can be improved to a bound of order one. This is a rotation project with László Erdös.
