- 95-438 Bricmont J. , Kupiainen A.
- Infinite dimensional SRB measures
(56K, Latex)
Oct 2, 95
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Abstract. We review the basic steps leading to the construction of a Sinai-Ruelle-Bowen (SRB) measure for an infinite lattice of weakly coupled expanding circle maps, and we show that this measure has exponential decay of space-time correlations. First, using the Perron-Frobenius operator, one connects the dynamical system of coupled maps on a
$d$-dimensional lattice to an equilibrium statistical mechanical model on a lattice of dimension $d+1$. This lattice model is, for weakly coupled maps, in high-temperature phase, and we use a general, but very elementary, method to prove exponential decay of correlations at high temperatures.
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