The finite group velocity of quantum spin systems

@article{Lieb1972TheFG,
title={The finite group velocity of quantum spin systems},
author={Elliott H. Lieb and Derek W. Robinson},
journal={Communications in Mathematical Physics},
year={1972},
volume={28},
pages={251-257}
}
• Published 1 September 1972
• Mathematics
• Communications in Mathematical Physics
AbstractIt is shown that if Φ is a finite range interaction of a quantum spin system,τtΦ the associated group of time translations, τx the group of space translations, andA, B local observables, then $$\mathop {\lim }\limits_{\begin{array}{*{20}c} {|t| \to \infty } \\ {|x| > \upsilon |t|} \\ \end{array} } ||[\tau _t^\Phi \tau _x (A),B]||e^{\mu (\upsilon )t} = 0$$ wheneverv is sufficiently large (v>VΦ) where μ(v)>0. The physical content of the statement is that information can propagate in the…
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Commun

• math. Phys. 7, 337 (1968). — See also; Streater, R. F.: Commun. math. Phys. 7, 93 (1968). — Ruskai,M.B.: Commun. math. Phys. 20, 193
• 1971