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Regensburg 2013 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 2: Statistical Physics in Biological Systems I (joint with BP)

DY 2.4: Talk

Monday, March 11, 2013, 10:15–10:30, H47

DNA denaturation in correlated environmentsViktoria Blavatska1, •Christian von Ferber2, and Yurij Holovatch11Institute for Condensed Matter Physics, NAS Ukraine, Lviv — 2Applied Mathematics Research Centre, Coventry University, UK

We revisit the problem of DNA denaturation in the frames of the Poland-Scheraga model. This model predicts a first or second order transition depending on the value of the loop exponent.

Usually an unperturbed background is assumed within this model. However, in a biologically relevant environment correlated structures are prevalent and the transition may change due to the influence of this environment.

Applying renormalisation group methods we determine the loop exponent in higher orders up to the fourth order in the є-expansion. In the absence of disorder this allows us to determine the numerical value of the exponent using resummation techniques.

Performing corresponding calculations for the situation of correlated environments we find strong disorder effects.

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