Tuesday, May 22, 2012

1205.4511 (K. Rapedius et al.)

Interaction-induced decoherence in non-Hermitian quantum walks of
ultracold Bosons
   [PDF]

K. Rapedius, H. J. Korsch
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 shows 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.
View original: http://arxiv.org/abs/1205.4511

No comments:

Post a Comment