A study of long time correlations in finite Φ⁴-SYSTEMS (d=1,2) BY use of molecular dynamics

S. Flach Inst. f. Theor. Physik, Technische Universität Dresden, Dresden, FRG

J. Siewert Research fellow of the Alexander von Humboldt Foundation

R. Siems Theoretische Physik, Universität des Saarlandes, Saarbrücken, FRG

J. Schreiber Inst. f. Theor. Physik, Technische Universität Dresden, Dresden, FRG

Abstract

Predictions of a mode-coupling approximation (MCA) are compared with molecular dynamics simulations of d=1,2 Φ-lattice systems with different next neighbour interaction strengths. In the long-time behaviour we find complete disagreement for weak coupling, whereas some predictions of MCA are qualitatively verified in the strong coupling case for d=1.

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A study of long time correlations in finite Φ⁴-SYSTEMS (d=1,2) BY use of molecular dynamics