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Regensburg 2007 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 30: Poster II

DY 30.69: Poster

Donnerstag, 29. März 2007, 16:00–18:00, Poster D

Collapse and Freezing Transitions of Polymers on Regular Lattices — •Thomas Vogel1, Michael Bachmann1,2, and Wolfhard Janke11Institute for Theoretical Physics, University Leipzig, PF 100920, 04109 Leipzig, Germany — 2Complex Systems Division, Lund University, Sweden

We present simulation results for the thermodynamical behavior of flexible polymers (interacting self-avoiding walks) on simple cubic (sc) and face-centered cubic (fcc) lattices. Beside the well-known collapse transition, we concentrate ourselves on the freezing transition ocurring at lower temperatures.

We show how this transition, also called crystallization, liquid-solid [1] or globule-groundstate transition [2], is influenced by the lattice and how the transition depends on the system size.

We employ the pruned-enriched Rosenbluth method (PERM) [3] and generalized extensions of it [4,5].
[1] F. Rampf, W. Paul, K. Binder, Europhys. Lett. 70 (2005) 628.

[2] M. Bachmann, W. Janke, J. Chem. Phys. 120 (2004) 6779.

[3] P. Grassberger, Phys. Rev. E 56 (1997) 3682.

[4] M. Bachmann, W. Janke, Phys. Rev. Lett. 91 (2003) 208 105.

[5] T. Prellberg, J. Krawczyk, Phys. Rev. Lett. 92 (2004) 120 602.

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