Spectrum occupies pseudospectrum for random matrices with diagonal deformation and variance profile
We consider n × n non-Hermitian random matrices with independent entries and a variance profile, as well as an additive deterministic diagonal deformation. We show that their empirical eigenvalue distribution converges to a limiting density as n tends to infinity and that the support of this density in the complex plane exactly coincides with the ε-pseudospectrum in the consecutive limits n → ∞ and ε → 0. The limiting spectral measure is identified as the Brown measure of a deformed operator-valued circular element with the help of [6].
Authors
- Johannes Alt
- Torben Krüger (ORCID: https://orcid.org/0000-0002-4821-3297)
Institutions
- Twitter (United States) (US)
Publication Details
- Journal
- Random Matrices Theory and Application
- Published
- 2026-09-18
- DOI
- https://doi.org/10.1142/s2010326326500139
- Primary Topic
- Random Matrices and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Villum Fonden
- Deutsche Forschungsgemeinschaft