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Asymptotic behavior of the entropy of chains placed on cylinders

W. G. Dantas* and M. J. de Oliveira

J. F. Stilck

  • Universidade de São Paulo, Caixa Postal 66318 05315-970 São Paulo, São Paulo, Brazil

  • Instituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, 24210-340, Niterói, RJ, Brazil

  • *wgd@gibbs.if.usp.br
  • oliveira@if.usp.br
  • jstilck@if.uff.br

Phys. Rev. E 76, 031133 – Published 27 September, 2007

DOI: https://doi.org/10.1103/PhysRevE.76.031133

Abstract

By using the transfer matrix approach, we investigate the asymptotic behavior of the entropy of flexible chains with M monomers each placed on strips with periodic boundary conditions (cylinders). In the limit of high density of monomers, we study the behavior of the entropy as a function of the density of monomers and the width of the strip, inspired by recent analytical studies of this problem for the particular case of dimers (M=2). We obtain the entropy in the asymptotic regime of high densities for chains with M=2,,9 monomers, as well as for the special case of polymers, where M, and find that the results show a regular behavior similar to the one found analytically for dimers. We also verify that in the low-density limit the mean-field expression for the entropy is followed by the results from our transfer matrix calculations.

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