Neutron and proton densities in the nuclear periphery are investigated within (p,n) charge-exchange isobar transitions. For this purpose we have developed parameterfree optical potentials 1) with a detailed treatment of the in-medium tτ part of the effective interaction. Non local coupled-channel Lane equations are solved to obtain the scattering observables. The use of conventional proton and ...

We study the unscreened Coulomb interaction in a one-dimensional electron system at low-energy. We use renormalization group methods and a GW approximation, in order to analyze the model. This yields both a strong wavefunction renormalization and a renormalization of the Fermi velocity. The significance of the effects depends on the filling level of the Fermi system. Despite the longrange chara...

We prove that the interaction among neutral atoms in ThomasFermi theory behaves, for large separation I, like Π~. The constant Γ is independent of the atomic nuclear charges, but does depend on the relative positions of the nuclei. We also show that Γ is not a simple sum of pair terms, i.e. in TF theory three and higher body terms persist into the asymptotic (in /) region.

A long-wavelength, low-frequency effective theory is obtained from t1− t2−J model. The action is written in terms of two-component bose spinor fields (CP 1 fields) and two spinless Fermi fields. The generalized CP 1 model is invariant under U(1) gauge transformations. The bose fields and one of the Fermi fields have charge +1 while the other Fermi field has charge −1 with respect to these trans...

In this paper,the experiment proved that shot noise is suppressed by Fermi and Coulomb interaction correlation. Meanwhile, the establishment of shot noise suppression factor (Fano) in ballistic transport nano-MOSFETs the Coulomb interaction correlation and the combination of the two effects are derived from separately considering the Fermi interaction correlation. And on this basis the variatio...

Using operator algebraic methods we show that the moment generating function of charge transport in a system with infinitely many non-interacting Fermions is given by a determinant of a certain operator in the one-particle Hilbert space. The formula is equivalent to a formula of Levitov in the finite dimensional case and may be viewed as its regularized form in general. Our result embodies two ...

We apply a recently proposed path-integral approach to non-local bosonization to a Thirring-like system modeling non-relativistic mass-less particles interacting with localized fermionic impurities. We consider forward scattering processes described by symmetric potentials including interactions between charge, current, spin and spin-current densities. In the general (spin-flipping) problem we ...

The influence of the concentration and size of sp carbon clusters on the field emission properties of hydrogenated amorphous carbon thin films is investigated. In combination with electron paramagnetic resonance and optical measurements, it is shown that the trend in the threshold field for emission for films deposited under certain conditions can be explained in terms of improvements in the co...

Using perturbation theory and the field theoretical renormalization group approach we consider a two-dimensional anisotropic truncated Fermi Surface(FS) with both flat and curved sectors which approximately simulates the “cold” and “hot” spots in the cuprate superconductors. We calculate the one-particle two-loop irreducible functions Γ and Γ as well as the spin, the charge and pairing response...