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A Spectral Theorem for the Semigroup Generated by a Class of Infinitely Many Master Equations

Boegli, Sabine; Vuillermot, Pierre-A.

A Spectral Theorem for the Semigroup Generated by a Class of Infinitely Many Master Equations Thumbnail


Pierre-A. Vuillermot


In this article we investigate the spectral properties of the infinitesimal generator of an infinite system of master equations arising in the analysis of the approach to equilibrium in statistical mechanics. The system under consideration thus consists of infinitely many first-order differential equations governing the time evolution of probabilities susceptible of describing jumps between the eigenstates of a differential operator with a discrete point spectrum. The transition rates between eigenstates are chosen in such a way that the so-called detailed balance conditions are satisfied, so that for a large class of initial conditions the given system possesses a global solution which converges exponentially rapidly toward a time independent probability of Gibbs type. A particular feature and a challenge of the problem under consideration is that in the infinite-dimensional functional space where the initial-value problem is well posed, the infinitesimal generator is realized as a non normal and non dissipative compact operator, whose spectrum therefore does not exhibit a spectral gap around the zero eigenvalue.

Journal Article Type Article
Acceptance Date Feb 17, 2022
Online Publication Date Mar 2, 2022
Publication Date 2022-04
Deposit Date Oct 27, 2022
Publicly Available Date Mar 2, 2023
Journal Acta Applicandae Mathematicae
Print ISSN 0167-8019
Electronic ISSN 1572-9036
Publisher Springer
Peer Reviewed Peer Reviewed
Volume 178
Issue 1
Article Number 4
Public URL


Accepted Journal Article (259 Kb)

Copyright Statement
This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at:

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