Fluctuations of local density of states and C0 speckle correlations are equal

TL;DR

This paper reveals a fundamental link between local density of states fluctuations and C0 speckle correlations in random media, showing that only C0 contributes to LDOS fluctuations and proposing a new way to identify scattering processes.

Contribution

It establishes a conceptual relation between LDOS fluctuations and speckle correlations, highlighting the unique role of C0 in infinite media and introducing a selection rule for scattering processes.

Findings

C0 correlation uniquely contributes to LDOS fluctuations in infinite media

A conceptual relation between LDOS fluctuations and speckle correlations is established

Proposes a selection rule to identify scattering processes contributing to C0

Abstract

We establish a conceptual relation between the fluctuations of the local density of states (LDOS) and intensity correlations in speckle patterns resulting from multiple scattering of waves in random media. We show that among known types of speckle correlations (C1, C2, C3, and C0) only C0 contributes to LDOS fluctuations in the infinite medium. We propose to exploit the equivalence of LDOS fluctuations and C0 intensity correlation as a `selection rule' for scattering processes contributing to C0.