Stochastic Interpretation of Inhomogeneous Spectroscopic Line Shapes

Abstract

Inhomogeneous distributions of transition frequencies are a ubiquitous appearance in many fields of spectroscopy [1–3]. This phenomenon means that an ensemble of identical particles within a sample in general do not have equal energy differences between the same pair of quantum states. The reason for these variations are inhomogeneities and fluctuations in the microscopic structure of the sample which lead to different local environment of the absorbing particles.