Equilibrium Moment Analysis of Itô SDEs

Fuente: arXiv
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Autores principales: Sabin-Miller, David, Abrams, Daniel M.
Formato: Preprint
Publicado: 2025
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author Sabin-Miller, David
Abrams, Daniel M.
author_facet Sabin-Miller, David
Abrams, Daniel M.
contents Stochastic differential equations have proved to be a valuable governing framework for many real-world systems which exhibit ``noise'' or randomness in their evolution. One quality of interest in such systems is the shape of their equilibrium probability distribution, if such a thing exists. In some cases a straightforward integral equation may yield this steady-state distribution, but in other cases the equilibrium distribution exists and yet that integral equation diverges. Here we establish a new equilibrium-analysis technique based on the logic of finite-timestep simulation which allows us to glean information about the equilibrium regardless -- in particular, a relationship between the raw moments of the equilibrium distribution. We utilize this technique to extract information about one such equilibrium resistant to direct definition.
format Preprint
id arxiv_https___arxiv_org_abs_2502_00918
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Equilibrium Moment Analysis of Itô SDEs
Sabin-Miller, David
Abrams, Daniel M.
Dynamical Systems
Numerical Analysis
Mathematical Physics
Stochastic differential equations have proved to be a valuable governing framework for many real-world systems which exhibit ``noise'' or randomness in their evolution. One quality of interest in such systems is the shape of their equilibrium probability distribution, if such a thing exists. In some cases a straightforward integral equation may yield this steady-state distribution, but in other cases the equilibrium distribution exists and yet that integral equation diverges. Here we establish a new equilibrium-analysis technique based on the logic of finite-timestep simulation which allows us to glean information about the equilibrium regardless -- in particular, a relationship between the raw moments of the equilibrium distribution. We utilize this technique to extract information about one such equilibrium resistant to direct definition.
title Equilibrium Moment Analysis of Itô SDEs
topic Dynamical Systems
Numerical Analysis
Mathematical Physics
url https://arxiv.org/abs/2502.00918