Interaction and correlation effects in quantum dots play a fundamental role in defining both their equilibrium and transport properties. Numerical methods are commonly employed to study such systems. In this paper we investigate the numerical calculation of quantum transport of electrons in spherical centered defect InGaAs/AlGaAs quantum dot (SCDQD). The simulation is based on the imaginary time...

The Barbero–Immirzi (BI) parameter is promoted to a field and a canonical analysis is performed when it is coupled with a Nieh–Yan topological invariant. It is shown that, in the effective theory, the BI field is a canonical pseudoscalar minimally coupled with gravity. This framework is argued to be more natural than the one of the usual Holst action. Potential consequences in relation with inf...

We prove that the scattering matrix at a fixed quasi–energy determines uniquely a time–periodic potential that decays exponentially at infinity. We consider potentials that for each fixed time belong to L in space. The exponent 3/2 is critical for the singularities of the potential in space. For this singular class of potentials the result is new even in the time–independent case, where it was ...

This article considers factors that limit or exclude civil society involvement in the regulatory process for nanotechnologies by critically examining an attempt to mount a public-interest legal challenge against the UK Health and Safety Executive for failing to properly enforce the European Biocidal Products Directive in relation to nanosilver consumer products. The temporal gap between innovat...

theoretically, in order to describe the behavior of a spectrum, a mathematical model whichcould predict the spectrum characteristics is needed. since in this study a two-state system has beenused like models which was introduced previously past and could couple with the environment, theformer ideas have been extended in this study. we use the second quantized version for writing thishamiltonian...

The ability of the present semiempirical quantum mechanics methods are surveyed for reproducing the transannular interaction in the bifunctional N-phenyl-5-azocanones. The AM1 method is the best with the order of reliability being Am1, PM3, MNDO and MINDO/3. AM1 calculations were then carried out for quantification of transannular interaction. The n(o) ionization potential has be...

We present an analytical investigation of revival phenomena in the finite square-well potential. The classical motion, revival, and super-revival time scales are derived exactly for wave packets excited in the finite well. These time scales exhibit a richer dependence on wave-packet energy and on potential-well depth than has been found in other quantum systems: They explain, for example, the d...

The stereodynamics of the Ar þ NO ( j1⁄4 0) rotational inelastic excitation has been investigated at 66 meV by means of quasiclassical trajectories on a recent ab initio potential energy surface. A marked correlation between the preferred sense of rotation of NO and the scattering plane is obtained for the highest rotational levels accessible, which are excited in strong repulsive collisions. T...

The nuclear Franck-Condon factor for the photodetachment processes H(D)2F-+h~+H (D)2+Fte-, H(D)FtH(D) tefor J=O has been calculated using the S-matrix Kohn variational method for reactive scattering on the T5a potential energy surface. The positions of peaks in the spectra of our theoretical calculations are in excellent agreement with those found in the recent experiment of Weaver and Neumark....