Nature of the glassy phase of RNA secondary structure

Details Nature of the glassy phase of RNA secondary structure Nature of the glassy phase of RNA secondary structure

2001-08-23

arxiv.org/abs/cond-mat/0108374v2

Europhys. Lett., 57 (5), pp. 752-758 (2002)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 1 figure

Scientific paper

10.1209/epl/i2002-00527-x

We characterize the low temperature phase of a simple model for RNA secondary structures by determining the typical energy scale E(l) of excitations involving l bases. At zero temperature, we find a scaling law E(l) \sim l^\theta with \theta \approx 0.23, and this same scaling holds at low enough temperatures. Above a critical temperature, there is a different phase characterized by a relatively flat free energy landscape resembling that of a homopolymer with a scaling exponent \theta=1. These results strengthen the evidence in favour of the existence of a glass phase at low temperatures.

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