Decoherence and disorder in quantum walks: From ballistic spread to localization
Quantum Physics
2011-11-15 v1
Abstract
We investigate the impact of decoherence and static disorder on the dynamics of quantum particles moving in a periodic lattice. Our experiment relies on the photonic implementation of a one-dimensional quantum walk. The pure quantum evolution is characterized by a ballistic spread of a photon's wave packet along 28 steps. By applying controlled time-dependent operations we simulate three different environmental influences on the system, resulting in a fast ballistic spread, a diffusive classical walk and the first Anderson localization in a discrete quantum walk architecture.
Cite
@article{arxiv.1101.2638,
title = {Decoherence and disorder in quantum walks: From ballistic spread to localization},
author = {A. Schreiber and K. N. Cassemiro and V. Potoček and A. Gábris and I. Jex and Ch. Silberhorn},
journal= {arXiv preprint arXiv:1101.2638},
year = {2011}
}