Bounds on Information Propagation in Disordered Quantum Spin Chains
Quantum Physics
2011-07-22 v3
Abstract
We investigate the propagation of information through the disordered XY model. We find, with a probability that increases with the size of the system, that all correlations, both classical and quantum, are suppressed outside of an effective lightcone whose radius grows at most polylogarithmically with |t|.
Keywords
Cite
@article{arxiv.quant-ph/0703209,
title = {Bounds on Information Propagation in Disordered Quantum Spin Chains},
author = {Christian K. Burrell and Tobias J. Osborne},
journal= {arXiv preprint arXiv:quant-ph/0703209},
year = {2011}
}
Comments
4 pages, pdflatex, 1 pdf figure. Corrected the bound for the localised propagator and quantified the probability it bound occurs