Titlebook: Recent Progress in Many-Body Theories; Volume 2 Y. Avishai Book 1990 Springer Science+Business Media New York 1990 astrophysics.chaos.eleme

戲服

Metamorphosis

Novel Singular Solutions of BCS Theory,hese solutions requires a minor modification of Eliashberg’s derivation. These solutions are particularly favorable for excitonic superconductivity, for which the range of the interaction n=(3π/2)v./ ω is one, or a few, lattice constants, and the Cooper pairs have some “bosonic” character

產(chǎn)生

A Vortex Lattice of Anyons in Strongly Correlated Systems,hase is called quantum spin liquid. A known example of such a spin liquid is the Heisenberg spin 1/2 in one dimension. The excitations are chargeless spin 1/2 particles with a linear energy momentum relation.

farewell

折磨

Two Dimensional Phenomena in High Temperature Superconductors,avior. The junctions exhibit an additional phase transition above which the layers are uncorrelated. The sesitivity of the latter transition to magnetic fields and the temerature dependence of the non-linear current-voltage relation are consistent with experimental data.

FATAL

Electron-Hole Liquid Model for High ,,-Superconductors,linear term. The metal-insulator transition found in these compounds is proposed to be connected with the vanishing of the sound velocity at small hole concentration. The basic assumptions are confirmed by numerical model calculations. Possible connection with heavy fermion systems is discussed.

善辯

Strong Electron Correlations in ,,,, Planes of HighTemperature Superconductors, It is found these correlations are particularly strong within orbitale. They lead to a drastic modification of the ground state, and result in only ? 3% population of .. configuration. The doped holes have ? 70% oxygen character, in agreement with experimental observations, as well as with the results of finite cluster diagonalization.

悄悄移動

Coherent Back Scattering and Other Optical Effects in Random Media,tic scattering arising from particle motion on the spectral distribution of the scattered light is discussed. It is pointed out that there is an interesting optical analog to the RKKY interaction in metals.

irradicable

Calculations of the Ground State of 16O,raction. Realistic interactions must contain botn two- and three-nucleon potentials and these potentials have a complicated non-central operator structure consisting, for example, of spin, isospin and tensor dependences. This structure results in formidable many-body problems in the computation of the ground states of nuclei.

Forehead-Lift

,The “ Ideal ” Shell Model Calculation,ish that the standard description fails to reproduce the binding energy and density of nuclear matter, .. The contributions of S. Peiper and T. Dickhoff to this conference deal with the subject. In this talk we describe minimal phenomenological remedies for this failure and discuss their origin and consequences.