Simulations of grafted polymers in a good solvent

Details Simulations of grafted polymers in a good solvent Simulations of grafted polymers in a good solvent

2004-10-03

arxiv.org/abs/cond-mat/0410055v2

Physics

Condensed Matter

Soft Condensed Matter

5 pages with 9 figures included; minor changes

Scientific paper

10.1088/0305-4470/38/2/003

We present improved simulations of three-dimensional self avoiding walks with one end attached to an impenetrable surface on the simple cubic lattice. This surface can either be a-thermal, having thus only an entropic effect, or attractive. In the latter case we concentrate on the adsorption transition, We find clear evidence for the cross-over exponent to be smaller than 1/2, in contrast to all previous simulations but in agreement with a re-summed field theoretic $\epsilon$-expansion. Since we use the pruned-enriched Rosenbluth method (PERM) which allows very precise estimates of the partition sum itself, we also obtain improved estimates for all entropic critical exponents.

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