The orbital-dependent correlation energy functional resulting from second order Kohn-Sham perturbation theory leads to atomic correlation potentials with correct shell structure and asymptotic behavior. The absolute magnitude of the exact correlation potential, however, is greatly overestimated. In addition, this functional is variationally instable, which shows up for systems with nearly degen...

We compute characteristic (quasinormal) frequencies corresponding to decay of a massive charged scalar field in a Reissner-Nordstrom black hole background. It proves that, contrary to the behavior at very late times, at the stage of quasinormal ringing the neutral perturbations will damp slower than the charged ones. In the limit of the extremal black hole the damping rate of charged and neutra...

We compute characteristic (quasinormal) frequencies corresponding to decay of a massive charged scalar field in a Reissner-Nordstrom black hole background. It proves that, contrary to the behavior at very late times, at the stage of quasinormal ringing the neutral perturbations will damp slower than the charged ones. In the limit of the extremal black hole the damping rate of charged and neutra...

We use the Newns-Anderson Hamiltonian to describe many-body electronic processes that occur when hyperthermal alkali atoms scatter off metallic surfaces. Following Brako and Newns, we expand the electronic many-body wavefunction in the number of particle-hole pairs (we keep terms up to and including a single particle-hole pair). We extend their earlier work by including level crossings, excited...

In order to develop an improved fundamental understanding of the microscopic effects of hole trapping by oxygen vacancy sites (VO) in amorphous a-SiO2, we have performed ab initio Hartree-Fock calculations of the structure and energy of model silicon dioxide clusters. Three different precursor clusters were employed in these calculations: (A) a 15 atom cluster without rings; (B) a 39 atom clust...

Recently a method has been developed for relating four dimensional Schwarzschild black holes in M-theory to near-extremal black holes in string theory with four charges, using suitably defined “boosts” and T-dualities. We show that this method can be extended to obtain the emission rate of low energy massless scalars for the four dimensional Schwarzschild hole from the microscopic picture of ra...

Abstract We study the circular orbits of charged particles around a weakly Kerr black hole immersed in weak, axisymmetric magnetic field. First, we review neutral particles. then and magnetized hole. The case is investigated thereafter. investigate, particular, effect electromagnetic forces on particles’ innermost stable orbits. examine conditions for existence negative-energy possibility emerg...

A self-consistent exact solution for a Reissner-Nordstr\"om black-and-white hole formed as result of accretion has been considered. Prior to the formation hole, there is bulk charged sphere at center system. The occurrence turning (bounce) point in newly investigated. was investigated by an example neutral spherical dust shell. model equations are written with allowance cosmological $\Lambda$-t...

We present photoluminescence studies of the molecular neutral biexciton-exciton spectra of individual vertically stacked InAs/GaAs quantum dot pairs. We tune either the hole or the electron levels of the two dots into tunneling resonances. The spectra are described well within a few-level, few-particle molecular model. Their properties can be modified broadly by an electric field and by structu...