Interaction-induced decoherence in non-Hermitian quantum walks of ultracold Bosons
Quantum Physics
2012-09-04 v2 Quantum Gases
Abstract
We study the influence of particle interaction on a quantum walk on a bipartite one-dimensional lattice with decay from every second site. The corresponding non-interacting (linear) system has been shown to have a topological transition described by the average displacement before decay. Here we use this topological quantity to distinguish coherent quantum dynamics from incoherent classical dynamics caused by a breaking of the translational symmetry. We furthermore analyze the behavior by means of a rate equation providing a quantitative description of the incoherent nonlinear dynamics.
Cite
@article{arxiv.1205.4511,
title = {Interaction-induced decoherence in non-Hermitian quantum walks of ultracold Bosons},
author = {K. Rapedius and H. J. Korsch},
journal= {arXiv preprint arXiv:1205.4511},
year = {2012}
}
Comments
Revised and extended version, 5 pages, 5 figures