Observation of subdiffusion of a disordered interacting system
Disordered Systems and Neural Networks
2015-02-27 v2 Quantum Gases
Quantum Physics
Abstract
We study the transport dynamics of matter-waves in the presence of disorder and nonlinearity. An atomic Bose-Einstein condensate that is localized in a quasiperiodic lattice in the absence of atom-atom interaction shows instead a slow expansion with a subdiffusive behavior when a controlled repulsive interaction is added. The measured features of the subdiffusion are compared to numerical simulations and a heuristic model. The observations confirm the nature of subdiffusion as interaction-assisted hopping between localized states and highlight a role of the spatial correlation of the disorder.
Cite
@article{arxiv.1011.2362,
title = {Observation of subdiffusion of a disordered interacting system},
author = {E. Lucioni and B. Deissler and L. Tanzi and G. Roati and M. Modugno and M. Zaccanti and M. Larcher and F. Dalfovo and M. Inguscio and G. Modugno},
journal= {arXiv preprint arXiv:1011.2362},
year = {2015}
}
Comments
8 pages, to be published on Physical Review Letters