Abstract
We give a Lieb-Robinson bound for the group velocity of a large class of discrete quantum systems which can be used to prove that a non-vanishing spectral gap implies exponential clustering in the ground state of such systems.
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Communicated by H. Spohn
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Nachtergaele, B., Sims, R. Lieb-Robinson Bounds and the Exponential Clustering Theorem. Commun. Math. Phys. 265, 119–130 (2006). https://doi.org/10.1007/s00220-006-1556-1
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DOI: https://doi.org/10.1007/s00220-006-1556-1