7 papers
The coherent scattering function in the reptation model: analysis beyond asymptotic limits
Lothar Schäfer, Ute Ebert, Artur Baumgärtner
We calculate the coherent dynamical scattering function S_c(q,t;N) of a flexible chain of length N, diffusing through an ordered background of topological obstacles. As an instruct…
The coherent scattering function of the reptation model: simulations compared to theory
Artur Baumgärtner, Ute Ebert, Lothar Schäfer
We present results of Monte Carlo simulations measuring the coherent structure function of a chain moving through an ordered lattice of fixed topological obstacles. Our computer ex…
Segment Motion in the Reptation Model of Polymer Dynamics. I. Analytical Investigation
U. Ebert, L. Schäfer, A. Baumgärtner
We analyze the motion of individual beads of a polymer chain using a discrete version of De Gennes' reptation model that describes the motion of a polymer through an ordered lattic…
Segment Motion in the Reptation Model of Polymer Dynamics. II. Simulations
A. Baumgärtner, U. Ebert, L. Schäfer
We present simulation data for the motion of a polymer chain through a regular lattice of impenetrable obstacles (Evans-Edwards model). Chain lengths range from N=20 to N=640, and…
Dynamics of unbinding of polymers in a random medium
Somendra M. Bhattacharjee, A. Baumgärtner
We have studied the aging effect on the dynamics of unbinding of a double stranded directed polymer in a random medium. By using the Monte Carlo dynamics of a lattice model in two…
Short Time Behavior in De Gennes' Reptation Model
Ute Ebert, Artur Baumgärtner, Lothar Schäfer
To establish a standard for the distinction of reptation from other modes of polymer diffusion, we analytically and numerically study the displacement of the central bead of a chai…