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A lattice model is presented for the simulation of dynamics in polymericsystems. Each polymer is represented as a chain of monomers, residing on asequence of nearest-neighbor sites of a face-centered-cubic lattice. Thepolymers are self- and mutually avoiding walks: no lattice site is visited bymore than one polymer, nor revisited by the same polymer after leaving it. Thedynamics occurs through single-monomer displacements over one lattice spacing.To demonstrate the high computational efficiency of the model, we simulate adense binary polymer mixture with repelling nearest-neighbor interactionsbetween the two types of polymers, and observe the phase separation over a longperiod of time. The simulations consist of a total of 46,080 polymers, 100monomers each, on a lattice with 13,824,000 sites, and an interaction strengthof 0.1 kT. In the final two decades of time, the domain-growth is found to bed(t) ~ t^1/3, as expected for a so-called "Model B" system.Comment: 6 pages, 4 eps figure

Reaching large lengths and long times in polymer dynamics simulations