Similar Search Results

Transport and diffusion in overdamped ratchets as a synchronization problem

Zarlenga, D.G.; Larrondo, H.A.; Arizmendi, C.M.; … - In: Physica A: Statistical Mechanics and its Applications 352 (2005) 2, pp. 282-294

The forced and overdamped motion of non-interacting particles in a periodic asymmetric potential is studied. The analysis is focused on synchronization of the motion of the particles with the external sinusoidal driving force. Two cases are considered: a perfect lattice without disorder and a...

Persistent link: https://www.econbiz.de/10010871669

Quantitative comparison of mean field mixing laws for conductivity and dielectric constants of porous media

Widjajakusuma, J.; Biswal, B.; Hilfer, R. - In: Physica A: Statistical Mechanics and its Applications 318 (2003) 3, pp. 319-333

Exact numerical solution of the electrostatic disordered potential problem is carried out for four fully discretized three-dimensional experimental reconstructions of sedimentary rocks. The measured effective macroscopic dielectric constants and electrical conductivities are compared with...

Persistent link: https://www.econbiz.de/10010873735

Effect of shape anisotropy on transport in a two-dimensional computational model: numerical simulations showing experimental features observed in biomembranes

Pradhan, Gauri R; Pandit, Sagar A; Gangal, Anil D; … - In: Physica A: Statistical Mechanics and its Applications 270 (1999) 1, pp. 288-294

We propose a 2-d computational model system comprising a mixture of spheres and the objects of some other shapes, interacting via the Lennard–Jones potential. We propose a reliable and efficient numerical algorithm to obtain void statistics. The void distribution, in turn, determines the...

Persistent link: https://www.econbiz.de/10010874522

Apparent nonuniversality in finite segregated tunneling–percolation models

Johner, N.; Grimaldi, C.; Ryser, P. - In: Physica A: Statistical Mechanics and its Applications 374 (2007) 2, pp. 646-654

We investigate the tunneling–percolation mechanism of DC transport nonuniversality for conducting particles of diameter … distribution function has a power-law divergence as g→0, leading to nonuniversal values of the transport exponent. Instead, finite … restricted to a very narrow region around the critical percolation threshold so that, for all practical purposes, DC transport …

Persistent link: https://www.econbiz.de/10011059694

Chaotic Hamiltonian pumps

Dittrich, Thomas; Gutiérrez, Marta; Sinuco, Germán - In: Physica A: Statistical Mechanics and its Applications 327 (2003) 1, pp. 145-150

We present the results of a first exploratory survey of chaotic hamiltonian pumps, constructed as ratchets of finite extension. Two simple models are studied, composed of single or double square potential wells subject to a two-parameter driving that acts on the depth or the position of the...

Persistent link: https://www.econbiz.de/10011060281

Thermoelectric transport properties through a T-shaped single quantum dot

Castellanos, R.; Franco, R.; Silva-Valencia, J.; … - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 24, pp. 5814-5821

We study the thermopower, thermal conductance, electric conductance and the thermoelectric figure of merit for a gate-defined T-shaped single quantum dot (QD). The QD is solved in the limit of strong Coulombian repulsion U→∞, inside the dot, and the quantum wire is modeled on a tight-binding...

Persistent link: https://www.econbiz.de/10011061272

Electron wave packet dynamics in twisted nonlinear ladders with correlated disorder

de Moura, F.A.B.F.; Fulco, U.L.; Lyra, M.L.; … - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 4, pp. 535-540

Within a tight-binding Hamiltonian approach, we study the dynamics of one-electron wave packets in a twisted ladder geometry with adiabatic electron–phonon interaction. The electron–phonon coupling is taken into account in the time-dependent Schrödinger equation through a cubic...

Persistent link: https://www.econbiz.de/10011061433

Ocean circulation and impacts on plankton near the Florida Keys

Willemsen, Jorge F. - In: Physica A: Statistical Mechanics and its Applications 357 (2005) 1, pp. 36-43

the purpose of evaluating the consequences of transport of these components. As a consequence, spatial distributions are …

Persistent link: https://www.econbiz.de/10011063829

Two-stream theory of diffusing light spectroscopies

Durian, D.J. - In: Physica A: Statistical Mechanics and its Applications 229 (1996) 2, pp. 218-235

A theory for the propagation of light through a randomly scattering slab is developed that does not take advantage of a diffusion approximation but can be solved analytically. The treatment allows for scattering anisotropy and boundary reflectivity to be incorporated in a straightforward fashion...

Persistent link: https://www.econbiz.de/10010586577

Transport generated by fluctuating temperature

Li, Yu-Xiao - In: Physica A: Statistical Mechanics and its Applications 238 (1997) 1, pp. 245-251

The Brownian diffusion of a particle in a periodic potential when the temperature of the thermal bath fluctuates is studied. The combination of a broken spatial symmetry in potential and time correlations in a fluctuation of temperature can generate directional current. The current can be used...

Persistent link: https://www.econbiz.de/10010586887