Bounds on Information Propagation in Disordered Quantum Spin Chains

preprint2011arXivOpen access

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|.

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