Effects of nucleon-nucleon correlations on exclusive (e, ep) reactions on closed-shell nuclei leading to single-hole states are studied using O(e, ep)N (6.32 MeV, 3/2) as an example. The quasi-hole wave function, calculated from the overlap of translationally invariant many-body variational wave functions containing realistic spatial, spin and isospin correlations, seems to describe the initial...

Classical radiation scattering experiments are related, via the first Born approximation, to the pair correlation function only. However statistical physics provides many inter-relationships between g(r) and higher correlation functions which can be exploited to study these functions. Some examples will be given and the limitations of this approach discussed. Many physical phenomena which invol...

Two dimensional fluorescence spectroscopy on suspensions of carbon nanotubes probes the electronic excitations of carbon nanotubes with unprecedented resolution and reveals systematic deviations from the predictions of conventional one electron theories. We address these problems by formulating a theory of the scaling optical excitation energies with band index, tube radius and chiral angle. Th...

Wavelength converters are a novel class of photonic integrated circuits that is crucial for multiwavelength fiber-optic communication networks [1]. Such converters switch the flow of information from one wavelength to another. We present here the simulation and analysis of an optoelectronic InP-based tunable wavelength converter (Fig. 14.1) that monolithically combines a preamplified receiver w...

We study a system containing many particles of identical kinematics with a zero range interaction that scatters one from the other, and with the possible exchange of an attribute. Taking an initial condition in which the attribute is asymmetrically distributed in the regions of momentum space occupied by the particles, we study the rate at which it becomes uniformly distributed, through collisi...

In the experiment of the quantum mirage, confinement of surface states in an elliptical corral has been used to project the Kondo effect from one focus where a magnetic impurity was placed, to the other empty focus. The signature of the Kondo effect is seen as a Fano antiresonance in scanning tunneling spectroscopy. This experiment combines the many-body physics of the Kondo effect with the sub...

The electronic and optical properties of semiconducting silicon nanotubes (SiNTs) are studied by means of the many-body Green's function method, i.e., GW approximation and Bethe-Salpeter equation. In these studied structures, i.e., (4,4), (6,6) and (10,0) SiNTs, self-energy effects are enhanced giving rise to large quasi-particle (QP) band gaps due to the confinement effect. The strong electron...

A review of new developments in theoretical and experimental electronic structure investigations of half-metallic ferromagnets (HMF) is presented. Being semiconductors for one spin projection and metals for another ones, these substances are promising magnetic materials for applications in spintronics (i.e., spin-dependent electronics). Classification of HMF by the peculiarities of their electr...

We have determined the electronic bandstructure of clean and potassium-doped single layer graphene, and fitted the graphene π bands to a oneand three-near-neighbor tight binding model. We characterized the quasiparticle dynamics using angle resolved photoemission spectroscopy. The dynamics reflect the interaction between holes and collective excitations, namely plasmons, phonons, and electron-h...