Project description
New approaches to describing the zeros of random polynomials
Random polynomials have been of interest to physicists as they can describe the behaviour of Coulomb gases or certain Bose gases with very high accuracy. The EU-funded RandPol project aims to study the zeros of random polynomials – one of the oldest and most fundamental problems in mathematics. Classic problems that arise on the macroscopic scale are the following: Where can zeros be located? Are there comprehensive descriptions of the behaviour of isolated zeros? Researchers are also interested in understanding the behaviour of random polynomials on the microscopic scale. Specifically, RandPol will link the local repartition of the zeros and the interaction between neighbouring zeros with renormalised energy, which is key to describing the local behaviour of particles in a Coulomb gas.
Objective
The aim of this project is to study the zeros of random polynomials. Random polynomials appeared in the 1930's with the pioneering works of Bloch, Polya and Kac. The study of random polynomials gained a strong interest of the physicists since the 1990's due to their connexion with interaction particle systems such as electron gases (also called Coulomb gases). Random polynomials were first considered as a toy model for more complicated systems, but in the 2000's they appeared to exactly describe the behavior of certain Bose Gases.
We want to understand the behavior of random polynomials at the macroscopic and microscopic scale. At the macroscopic scale, several questions naturally arise: Where can we locate the zeros? Are there isolated zeros far away from the rest of them? Can we describe the behavior of those isolated zeros?
Very recent breakthrough (2019) were made in both localisation and isolated zeros for specific models of random pomynomials with some symmetry constraints. Our goal is to obtain general results on these questions. We plan to develop new ideas to tackle these questions, without relying on the symmetry structure.
At the microscopic scale, we want to understand the local repartition of the zeros and the interaction between neighboors. This question lead to adapt concepts from mathematical physics such as the microscopic renormalized energy to the study of zeros of random polynomials. Recent studies also linked the local behavior of zeros of random polynomials to the zeros of Random Analytic Functions, which have a lot of connexions to several domains in mathematics (Analysis, Image processing, random matrix theory, mathematical physiqucs).
The concept of renormaliazed energy is very recent (2017), and was introduced by Leblé and Serfaty to understand the local behavior of particles from a Coulomb gas. We think that this approach can lead to a new understanding of the behavior of zeros of random polynomials.
Fields of science
Programme(s)
Funding Scheme
MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)Coordinator
1211 Geneve
Switzerland