It is shown that the calculation of the magnetic moment of a Friedel-Anderson impurity in mean-field theory is unreliable. A class of approximate solutions, which contains the mean-field solution as an element, is expressed in rotated Hilbert space and optimized. The optimal state has considerably lower energy than the mean field solution and requires almost twice the Coulomb exchange U to beco...

The question of whether architectural creativity is more of an artistic or engineering nature is one with a long history but also one with no conclusive answer. The art camp would argue that technology should be treated as a means towards and end, and that technology alone cannot give meaning to our lives. The engineering camp on the other hand would argue that good problem-solving result...

The magnetic measurements and resonance studies on pseudobinary cubic compounds suggest that the 3d electrons of transition metal atoms do not share a common 3d band. Although the magnetic properties of pseudobinary rare-earth (yttrium)-transition metal (T) compounds of R@kTT -3,-type have been studied generally [l] we have no information on the individual magnetic behaviour of T' and T atoms. ...

We analyze the electromagnetic form factors of the ground state baryon octet to fourth order in relativistic baryon chiral perturbation theory. Predictions for the Σ charge radius and the Λ–Σ0 transition moment are found to be in excellent agreement with the available experimental information. Furthermore, the convergence behavior of the hyperon charge radii is shown to be more than satisfactory.

We predict an anomaly in highly excited bending spectra of acetylene with high vibrational angular momentum. We interpret this in terms of a vibrational shape effect with moment of inertia backbending, induced by a sequence of bifurcations with a transition from "local" to "orthogonal" modes.

The solutions of the reduced Maxwell–Bloch equations for an anisotropic two-level medium, which describe the propagation of electromagnetic pulses having a duration from a few field oscillations, are studied. An influence of the permanent dipole moment of the quantum transition on dynamics of the pulses and their spectrum is considered.

-We made magnetization measurements and X-ray diffraction experiments for Ga2-xCo2-yFex+y (0 5 x 5 1, 0 5 y 5 I), which has b.c.c. structure with an ordered lattice of B2 or L21 type. Contours of magnetic moments and Curie temperatures in the z y plane were determined. The magnetic moment per transition element atom depends predominantly on Ga concentration.

In polarized infrared (IR) absorption experiments , dichroic values are used to study the structure and orientation of lipid molecules. From computer simulations , we obtained angular distributions of IR transition moment (TM) orientations of the stretch vibrations of CH 2 groups of