Phys. Rev. Lett. 99, 167201 (2007) [4 pages]Bounds on the Speed of Information Propagation in Disordered Quantum Spin Chains
We investigate the propagation of information through the disordered XY model. We find that all correlations, both classical and quantum, are exponentially suppressed outside of an effective light cone whose radius grows at most logarithmically with |t|. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.167201
DOI:
10.1103/PhysRevLett.99.167201
PACS:
75.10.Pq, 03.67.−a, 72.15.Rn, 75.40.Mg
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