Make Slow Fast -- how to speed up interacting disordered matter

TL;DR

This paper proposes a method to accelerate subdiffusive delocalization in disordered quantum systems by ramping interaction strength, enabling faster diffusion and facilitating experimental and numerical studies.

Contribution

It introduces a novel interaction ramping technique that transforms subdiffusive behavior into normal diffusion in disordered atomic systems.

Findings

Subdiffusion is accelerated to normal diffusion with interaction ramping.

The method applies to both disordered and kicked atomic systems.

Results open pathways for experimental validation and higher-dimensional studies.

Abstract

Anderson and dynamical localization have been experimentally observed with ultra-cold atomic matter. Feshbach resonances are used to efficiently control the strength of interactions between atoms. This allows to study the delocalization effect of interactions for localized wave packets. The delocalization processes are subdiffusive and slow, thereby limiting the quantitative experimental and numerical analysis. We propose an elegant solution of the problem by proper ramping the interaction strength in time. We demonstrate that subdiffusion is speeded up to normal diffusion for interacting disordered and kicked atomic systems. The door is open to test these theoretical results experimentally, and to attack similar computational quests in higher space dimensions