Information loss in coarse graining of polymer configurations via contact matrices
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چکیده
Contact matrices provide a coarse grained description of the configurationω of a linear chain (polymer or random walk) on Z: Cij (ω) = 1 when the distance between the positions of the ith and j th steps are less than or equal to some distance a and Cij (ω) = 0 otherwise. We consider models in which polymers of length N have weights corresponding to simple and self-avoiding random walks, SRW and SAW, with a the minimal permissible distance. We prove that to leading order in N, the number of matrices equals the number of walks for SRW, but not for SAW. The coarse grained Shannon entropies for SRW agree with the fine grained ones for n 2, but differs for n 3. PACS numbers: 87.10.+e, 05.50.+q
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تاریخ انتشار 2002