4 research outputs found
Electronic transport in a series of multiple arbitrary tunnel junctions
Monte Carlo simulations and an analytical approach within the framework of a
semiclassical model are presented which permit the determination of Coulomb
blockade and single electron charging effects for multiple tunnel junctions
coupled in series. The Coulomb gap in the I(V) curves can be expressed as a
simple function of the capacitances in the series. Furthermore, the magnitude
of the differential conductivity at current onset is calculated in terms of the
model. The results are discussed with respect to the number of junctions.Comment: 3 figures, revte
On the Existence of Quasipattern Solutions of the Swift-Hohenberg Equation
Quasipatterns (two-dimensional patterns that are quasiperiodic in any spatial direction) remain one of the outstanding problems of pattern formation. As with problems involving quasiperiodicity, there is a small divisor problem. In this paper, we consider 8-fold, 10-fold, 12-fold, and higher order quasipattern solutions of the Swift-Hohenberg equation. We prove that a formal solution, given by a divergent series, may be used to build a smooth quasiperiodic function which is an approximate solution of the pattern-forming partial differential equation (PDE) up to an exponentially small error