Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1997-12-03
J. Phys. A 30 (1997) L829-L838
Physics
Condensed Matter
Statistical Mechanics
12 pages, Tex (harvmac.tex), 4 figures. J.Phys.A (in press)
Scientific paper
10.1088/0305-4470/30/24/003
We study the folding of the regular two-dimensional triangular lattice embedded in the regular three-dimensional Face Centered Cubic lattice, in the presence of quenched random spontaneous curvature. We consider two types of quenched randomness: (1) a ``physical'' randomness arising from a prior random folding of the lattice, creating a prefered spontaneous curvature on the bonds; (2) a simple randomness where the spontaneous curvature is chosen at random independently on each bond. We study the folding transitions of the two models within the hexagon approximation of the Cluster Variation Method. Depending on the type of randomness, the system shows different behaviors. We finally discuss a Hopfield-like model as an extension of the physical randomness problem to account for the case where several different configurations are stored in the prior pre-folding process.
Guitter Emmanuel
Mori Satoru
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