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27 May 2020
  » arxiv » cond-mat/9908132

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Comment on `Glassy Transition in a Disordered Model for the RNA Secondary Structure'
Alexander K. Hartmann ;
Date 9 Aug 1999
Journal Phys. Rev. Lett. 86, 1382 (2001)
Subject Disordered Systems and Neural Networks; Soft Condensed Matter | cond-mat.dis-nn cond-mat.soft q-bio
AffiliationUniv. Goettingen, Germany
AbstractIn cond-mat/9907125 the low-temperature behavior of a model for RNA secondary structure was studied. It is claimed that the model exhibits a breaking of the replica symmetry, since the width of the distribution P(q) of overlaps may converge to a finite value at T=0. The authors used an exact enumeration method to obtain all ground states for a given RNA sequence. Because of the exponential growing degeneracy, only sequences up to length L=256 could be studied. Here it is shown that, in contrast to the previous results, by going to much larger sizes as L=2000 the variance coverges towards zero, i.e. P(q) is a delta-function in the thermodynamic limit.
Source arXiv, cond-mat/9908132
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