Non-equilibrium current via geometric scatterers

Non-equilibrium current via geometric scatterers

We investigate non-equilibrium particle transport in the system consisting of a geometric scatterer and two leads coupled to heat baths with different chemical potentials. We derive expression for the corresponding current the carriers of which are fermions and analyze numerically its dependence of the model parameters in examples, where the scatterer has a rectangular or triangular shape. PACS...

Evaluation of current distribution induced on perfect electrically conducting scatterers

A single{mode quantum transport in serial{structure geometric scatterers

We study transport in quantum systems consisting of a finite array of N identical single–channel scatterers. A general expression of the S matrix in terms of the individual–element data obtained recently for potential scattering is rederived in this wider context. It shows in particular how the band spectrum of the infinite periodic system arises in the limit N → ∞ . We illustrate the result on...

Non equilibrium phase diagrams of current driven Josephson junction arrays

We present a review of our previous numerical studies on non equilibrium vortex dynamics in Josephson Junction arrays (JJA) driven by a dc current. Dynamical phase diagrams for different magnetic fields, current directions and varying temperature are discussed and compared. First, the effect of thermal fluctuations in a current driven diluted vortex lattice (VL) is analyzed. The case of f = 1/2...

Non-equilibrium current and electron pumping in nanostructures

We discuss a numerical method to study electron transport in mesoscopic devices out of equilibrium. The method is based on the solution of operator equations of motion, using efficient Chebyshev time propagation techniques. Its peculiar feature is the propagation of operators backwards in time. In this way the resource consumption scales linearly with the number of states used to represent the ...