Anderson Localization of Composite Excitations in Disordered Optomechanical Arrays

TL;DR

This paper investigates Anderson localization of hybrid photon-phonon excitations in disordered optomechanical arrays, revealing controllable localization properties influenced by external laser parameters, with potential implications for non-equilibrium quantum systems.

Contribution

It introduces disordered optomechanical arrays as a platform to study localization of hybrid excitations, highlighting the tunability of localization length via laser intensity and frequency.

Findings

Localization length depends on laser intensity and frequency.

Hybrid excitations exhibit non-trivial localization behavior.

Evidence of Anderson localization in a non-equilibrium dissipative system.

Abstract

Optomechanical arrays are a promising future platform for studies of transport, many-body dynamics, quantum control and topological effects in systems of coupled photon and phonon modes. We introduce disordered optomechanical arrays, focusing on features of Anderson localization of hybrid photon-phonon excitations. It turns out that these represent a unique disordered system, where basic parameters can be easily controlled by varying the frequency and the amplitude of an external laser field. We show that the two-species setting leads to a non-trivial frequency dependence of the localization length for intermediate laser intensities. This could serve as a convincing evidence of localization in a non-equilibrium dissipative situation.