Regensburg 2013 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 3: Statistical Physics in Biological Systems I (joint with DY)
BP 3.4: Vortrag
Montag, 11. März 2013, 10:15–10:30, H47
DNA denaturation in correlated environments — Viktoria Blavatska1, •Christian von Ferber2, and Yurij Holovatch1 — 1Institute 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.