The thermally activated crossing of a semiflexible ring polymer over a potential barrier was studied. The crossing rate was calculated using Kramers' rate theory and functional integral method. The crossing rate of a flexible ring was found larger than that for a stiff ring due to its conformational fluctuations. The ring underwent a compact-stretch transition for a long chain length and weak bending modulus. The stretched conformation of the chain resulted in increase of rate with decreasing activation energy.
|Number of pages||6|
|Journal||Physical Review E - Statistical, Nonlinear, and Soft Matter Physics|
|Issue number||4 I|
|State||Published - Oct 2001|