Dynamical scaling of the DNA unzipping transition

Details Dynamical scaling of the DNA unzipping transition Dynamical scaling of the DNA unzipping transition

2001-03-06

arxiv.org/abs/cond-mat/0103142v1

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 4 figures, A shorter version of this paper appeared in Phys. Rev. Lett. 88, 028102 (2002)

Scientific paper

10.1103/PhysRevLett.88.028102

We report studies of the equilibrium and the dynamics of a general set of lattice models which capture the essence of the force-induced or mechanical DNA unzipping transition. Besides yielding the whole equilibrium phase diagram in the force vs temperature plane, which reveals the presence of an interesting re-entrant unzipping transition for low T, these models enable us to characterize the dynamics of the process starting from a non-equilibrium initial condition. The thermal melting of the DNA strands displays a model dependent time evolution. On the contrary, our results suggest that the dynamical mechanism for the unzipping by force is very robust and the scaling behaviour does not depend on the details of the description we adopt.

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