Physics – Mathematical Physics
Scientific paper
2005-06-10
Commun. Math. Phys., 265 (2006) 119-130
Physics
Mathematical Physics
v2: corrected proof of Theorem 2. v3: slightly better bound in Theorem 2; updated proof
Scientific paper
10.1007/s00220-006-1556-1
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.
Nachtergaele Bruno
Sims Robert
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