The ground state energy of a polaron in a superlattice was calculated using the doubletime Green functions. The e ective mass of the polaron along the planes perpendicular to the superlattice axis was also calculated. The dependence of the ground state energy and the e ective mass along the planes perpendicular to the superlattice axis on the electron-phonon coupling constant and on the superla...

In this paper we establish the existence of certain classes of solutions to the energy critical nonlinear wave equation in dimensions 3 and 5 assuming that the energy exceeds the ground state energy only by a small amount. No radial assumption is made. We find that there exist four sets in Ḣ × L with nonempty interiors which correspond to all possible combinations of finite-time blowup on the o...

The electric quadrupole coupling constant of the 31Al ground state is measured to be νQ = ∣

Magnetic resonance in the ground states of 3He has been studied through the interaction with metastable atoms in a gas discharge. Modulation showing the characteristics of the ground-state resonances is observed in a transverse beam of hght absorbed by the metastable atoms. This IS evidence of the transfer of transverse magnetization (coherence between eigenstates) by coilision. A theory is dev...

We provide numerical evidence that the ground state of a short range interaction model at ν = 1/2 is incompressible and spin-singlet for a wide range of repulsive interactions. Furthermore it is accurately described by a trial wave function studied earlier. For the Coulomb interaction we find that this wave function provides a good description of the lowest lying spin-singlet state, and propose...

We study the fractional quantum Hall effect in a bilayer with charge-distribution imbalance induced, for instance, by a bias gate voltage. The bilayer can either be intrinsic or it can be formed spontaneously in wide quantum wells, due to the Coulomb repulsion between electrons. We focus on fractional quantum Hall effect in asymmetric bilayer systems at filling factor ν = 4/11 and show that an ...

the near field ground motions have a high amplitude pulse like at the beginning of the seismogram which are significantly influenced by the rupture mechanism and direction of rupture propagation. this type of ground motion cause higher demands for engineering structures and its response spectrum is dramatically different than far field spectra. tabriz is one of the ancient cities in azerbaijan ...