Unzipping an adsorbed polymer in a dirty or random environment

Details Unzipping an adsorbed polymer in a dirty or random environment Unzipping an adsorbed polymer in a dirty or random environment

2005-05-12

arxiv.org/abs/cond-mat/0505315v2

Phys. Rev. E 72, 051803 (2005)

Physics

Condensed Matter

Statistical Mechanics

Published version, uses revtex4, 14 pages

Scientific paper

10.1103/PhysRevE.72.051803

The phase diagram of unzipping of an adsorbed directed polymer in two dimensions in a random medium has been determined. Both the hard-wall and the soft-wall cases are considered. Exact solutions for the pure problem with different affinities on the two sides are given. The results obtained by the numerical procedure adopted here are shown to agree with the exact results for the pure case. The characteristic exponents for unzipping for the random problem are different from the pure case. The distribution functions for the unzipped length, first bubble, and the spacer are determined.

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