Nonlinear structures and thermodynamic instabilities in a one-dimensional lattice system

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The equilibrium states of the discrete Peyrard-Bishop Hamiltonian with one end fixed are computed exactly from the two-dimensional nonlinear Morse map. These exact nonlinear structures are interpreted as domain walls (DW), interpolating between bound and unbound segments of the chain. The free energy of the DWs is calculated to leading order beyond the Gaussian approximation. Thermodynamic instabilities (e.g. DNA unzipping and/or thermal denaturation) can be understood in terms of DW formation.
4 pages, 5 figures, to appear in Phys. Rev. Lett

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Statistical Mechanics, Soft Condensed Matter, Biological Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/131776

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0411188
 http://arxiv.org/abs/cond-mat/0411188
 Phys. Rev. Lett. 93, 258101 (2004)
 doi:10.1103/PhysRevLett.93.258101

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