Phys. Rev. E 72, 051803 (2005) [14 pages]Unzipping an adsorbed polymer in a dirty or random environmentReceived 12 May 2005; published 2 November 2005 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.72.051803
DOI:
10.1103/PhysRevE.72.051803
PACS:
82.35.Gh, 64.60.Fr, 82.37.Rs
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