in this study, polyaniline molecule (emeraldine base) is modeled as a molecular wire and the effects of the metal/molecule coupling strength and the molecule length on the current-voltage (i-v) characteristics are numerically investigated. using a tight-binding hamiltonian model, the methods based on non-equilibrium green’s function theory, landauer formalism and newns-anderson model, our calcu...

We examine two restructurings of the series relationship between the bare and renormalized coupling constant in dimensional regularization. In one of these restructurings, we are able to demonstrate via all-orders summation of leading and successive ǫ = 0 (dimensionality = 4) poles that the bare coupling vanishes in the dimension-4 limit. Electronic address: [email protected] Electronic address: dg...

It is shown that the exact Foldy-Wouthuysen transformation for spin-0 particles on spacetimes described by the metrics ds = V dt −W dx, where V = V (x) and W = W (x), only exists if the scalar field is nonminimally coupled to the Ricci scalar field with a coupling constant equal to 1 6 . The nonminimal coupling term, in turn, does not violate the equivalence principle. As an application we obta...

We study the time evolution of a system of fermions with pairing interactions at a finite temperature. The dynamics is triggered by an abrupt increase in the BCS coupling constant. We show that if initially the fermions are in a normal phase, the amplitude of the BCS order parameter averaged over the Boltzmann distribution of initial states exhibits damped oscillations with a relatively short d...

Abstract. The apparent unification of gauge couplings around 1016 GeV is one of the strong arguments in favor of Supersymmetric extensions of the Standard Model (SM). In this contribution two new analyses of the gauge coupling running, the latter using in contrast to previous studies not data at the Z peak but at LEP2 energies, are presented. The generic SUSY scale in the more precise novel app...

Various object-oriented (OO) coupling metrics have been proposed for capturing the level of class coupling in object-oriented systems. Since product complexity plays a major role in determining the quality of software, metrics developed to characterize internal attributes such as coupling need to be validated to determine the usefulness of the measures. In this paper, we present an analysis of ...

We investigate experimentally attractor bubbling in a system of two coupled hyperchaotic electronic circuits. The degree of synchronization over a range of coupling strengths for two different coupling schemes is measured to identify bubbling. The circuits display regimes of both attractor bubbling and high-quality synchronization. For the coupling scheme where high-quality synchronization is o...