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Out-Of-Equilibrium Characteristics Of A Forced Translocating Chain Through A Nanopore, Aniket Bhattacharya, Kurt Binder
Out-Of-Equilibrium Characteristics Of A Forced Translocating Chain Through A Nanopore, Aniket Bhattacharya, Kurt Binder
Faculty Bibliography 2010s
Polymer translocation through a nanopore in a thin membrane is studied using a coarse-grained bead-spring model and Langevin dynamics simulation with a particular emphasis to explore out of equilibrium characteristics of the translocating chain. We analyze the out of equilibrium chain conformations both at the cis and the trans side separately either as a function of the time during the translocation process or as as function of the monomer index m inside the pore. A detailed picture of translocation emerges by monitoring the center of mass of the translocating chain, longitudinal and transverse components of the gyration radii and the …
Scale-Dependent Anisotropic Polarizability In Mesoscopic Structures, David Haefner, Sergey Sukhov, Aristide Dorgariu
Scale-Dependent Anisotropic Polarizability In Mesoscopic Structures, David Haefner, Sergey Sukhov, Aristide Dorgariu
Faculty Bibliography 2010s
Optical properties of inhomogeneous materials are, in general, scale dependent. We show that, when observed at mesoscopic scales, the local anisotropic polarizabilities depend on the volume of interaction, which may be limited by either the excitation field or material dimensions. We demonstrate the existence of a specific interaction length scale corresponding to the maximum degree of local anisotropy and discuss its relation to the detailed morphology of a disordered medium. Probing these mesoscopic scales provides information about the local structure and allows characterizing material systems that otherwise may appear similar.
Delta-Expansion Method For Nonlinear Stochastic Differential Equations Describing Wave Propagation In A Random Medium, Robert A. Van Gorder
Delta-Expansion Method For Nonlinear Stochastic Differential Equations Describing Wave Propagation In A Random Medium, Robert A. Van Gorder
Faculty Bibliography 2010s
We apply the delta-expansion method to nonlinear stochastic differential equations describing wave propagation in a random medium. In particular, we focus our attention on a model describing a nonlinear wave propagating in a turbulent atmosphere which has random variations in the refractive index (we take these variations to be stochastic). The method allows us to construct much more reasonable perturbation solutions with relatively few terms (compared to standard "small-parameter" perturbation methods) due to more accurate linearization used in constructing the initial approximation. We demonstrate that the method allows one to compute effective wave numbers more precisely than other methods applied …