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Comment on `Glassy Transition in a Disordered Model for the RNA Secondary Structure'

Alexander K. Hartmann
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Abstract

In 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.

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Alexander K. Hartmann. 2000-04-07. Comment on `Glassy Transition in a Disordered Model for the RNA Secondary Structure'. https://doi.org/10.1103/physrevlett.86.1382

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