Stability for inverse source problems of the stochastic Helmholtz equation with a white noise

TL;DR

This paper establishes stability estimates for inverse source problems of the stochastic Helmholtz equation with white noise, providing quantitative measures for source reconstruction in both homogeneous and inhomogeneous media.

Contribution

It introduces stability estimates for inverse source problems of the stochastic Helmholtz equation driven by white noise, including Hölder and logarithmic stability results.

Findings

Hölder stability estimate for homogeneous media

Logarithmic stability estimate for inhomogeneous media

Well-posedness of the direct source problem

Abstract

This paper is concerned with the stability estimates for inverse source problems of the stochastic Helmholtz equation driven by white noise. The well-posedness is established for the direct source problems, which ensures the existence and uniqueness of solutions. The stability estimates are deduced for the inverse source problems, which aim to determine the strength of the random source. To enhance the stability of the inverse source problems, we incorporate a priori information regarding the regularity and support of the strength. In the case of homogeneous media, a H\"{o}lder stability estimate is established, providing a quantitative measure of the stability for reconstructing the source strength. For the more challenging scenario of inhomogeneous media, a logarithmic stability estimate is presented, capturing the intricate interactions between the source and the varying medium properties.