Regensburg 2010 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 28: Phase transitions and Critical Phenomena II
DY 28.5: Talk
Thursday, March 25, 2010, 15:15–15:30, H47
Polymers in crowded environment under stretching force: globule-coil transitions — •Wolfhard Janke1 and Viktoria Blavatska1,2 — 1Institut für Theoretische Physik, Universität Leipzig, Postfach 100 920, 04009 Leipzig, Germany — 2Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 79011 Lviv, Ukraine
We study flexible polymer macromolecules in a crowded (porous) environment, modeling them as self-attracting self-avoiding walks on site-diluted percolative lattices in space dimensions d=2 and 3. The influence of stretching force on the polymer folding and properties of globule-coil transitions are analyzed. Applying the pruned-enriched Rosenbluth chain-growth method (PERM), we estimate the transition temperature TΘ between collapsed and extended polymer configurations and construct the phase diagrams of the globule-coil coexistence when varying temperature and stretching force. The transition to a completely stretched state, caused by applying force, is discussed as well.
[1] V. Blavatska and W. Janke, Phys. Rev. E 80, 051805 (2009).