We investigate the influence of diagonal and off-diagonal disorder potentials on superconductivity in an attractive Hubbard model. The study is motivated by recent experimental and theoretical interest in understanding the microscopic mechanism by which impurities destroy superconductivity. In...

In recent decades, a number of centrality metrics describing network properties of nodes have been proposed to rank the importance of nodes. In order to understand the correlations between centrality metrics and to approximate a high-complexity centrality metric by a strongly correlated...

The BCS to BEC crossover in attractive Fermi systems is a prototype of weak to strong coupling evolution in many body physics. While extensive numerical results are available, and several approximate methods have been developed, most of these schemes are unsuccessful in the presence of spatial...

This article is concerned with the numerical study and modelling of two aspects the formation of laminar holes in transitional turbulence of plane Couette flow (PCF). On the one hand, we consider quenches: sudden decreases of the Reynolds number R which force the formation of holes. The Reynolds...

Using the United Nations COMTRADE database [United Nations Commodity Trade Statistics Database, available at: <ExternalRef> <RefSource>http://comtrade.un.org/db/</RefSource> <RefTarget Address="http://comtrade.un.org/db/" TargetType="URL"/> </ExternalRef>. Accessed November (2014)] we construct the Google matrix G of multiproduct world trade between the UN countries and analyze the properties of trade flows...</refsource></externalref>

We investigate the properties of a graphene system taking into account both the on-site Coulomb repulsion and the Rashba spin-orbit coupling caused by a transverse electric field by using a mean-field approximation of the Hubbard model. It is found that by increasing the strength of the Rashba...

We frequently employ the intuitive concept that a multiplicative noise can expel a system towards the field values for which intensity is negligible. This process applies even when such noise effects are opposed to the deterministic forces. In addition, it has been stated that a system may be...

We study a model of an electron on a cylindrical surface, which is coupled to the torsion field due to a dislocation along the axis of the cylinder. We discuss the effect of this torsion field on the energy spectrum of the electrons and analytically calculate persistent currents in the presence...

This work mainly examines the anisotropic transport phenomenon in the presence of square arrays of the mesoscopic pinning sites in superconducting samples. Our results were obtained from a series of numerical simulations as functions of the magnetic field and the pinning radius. Dynamic...

We report numerical investigation of the glassy behavior of random-field exchange models in three dimensions. Correlation of energy with the magnetization for different numbers of spin components has been studied. There is a profound difference between the models with two and three spin...