Intensity pseudo-localized phase in the glassy random laser

TL;DR

This paper presents evidence for a novel pseudo-localized phase in glassy random lasers, where light mode intensities are neither fully spread nor localized, indicating a complex hybrid state in disordered optical systems.

Contribution

It introduces the concept of a pseudo-localized phase in the low-temperature replica symmetry breaking phase of glassy random laser models, demonstrating its robustness beyond finite size effects.

Findings

Identification of a pseudo-localized phase in the model

The phase persists in the large size limit

Hybrid intensity distribution of light modes

Abstract

Evidence of an emergent pseudo-localized phase characterizing the low-temperature replica symmetry breaking phase of the complex disordered models for glassy light is provided in the mode-locked random laser model. A pseudo-localized phase corresponds to a state in which the intensity of light modes is neither equipartited among all modes nor really localized on few of them. Such a hybrid phase has been recently characterized in other models, such as the Discrete Non-Linear Schr\"odinger equation, just as a finite size effect, while in the low temperature phase of the glassy random laser it seems to be robust in the limit of large size.