Titlebook: Symmetries in Physics; Group Theory Applied Wolfgang Ludwig,Claus Falter Textbook 19881st edition Springer-Verlag Berlin Heidelberg 1988 Hi

Ornament

0171-1873 neral physical considerations, and on the other hand, particular problems may be solved in simpler and more elegant ways if symmetry is taken into account. This book presents the underlying theories of symmetry and gives examples of their application in branches of physics ranging from solid-state t

圆柱

Introduction,o classify the properties or the states of the systems with respect to these symmetries. Group theory provides the mathematical tools for the description of symmetries. Within representation theory, methods are developed that allow classification of the physical states of a system with respect to th

miniature

名义上

妨碍

Representations of Finite Groups, characters of these representations. Of all the possible representations, those by linear operators, or more specifically, by matrices, are the most essential ones. The basic spaces are the linear (vector) spaces, which are discussed first in this chapter. Then the properties of different represent

Spangle

podiatrist

Molecular Spectra,ules possess definite symmetries, the calculation of such states can be reduced to a large extent by using group theoretical methods. This is illustrated in the following, starting with the vibrational states (including infrared absorption and Raman effect), then discussing the properties of one-ele

敬礼

Selection Rules and Matrix Elements,is chapter for tensor (scalar, vector) operators. Examples are connected with the Jahn-Teller effect, including spin and time reversal symmetry, radiative transitions between different energy levels, the splitting of energy levels in a crystalline field and the Stark and Zeeman effects. Section 8.5

使痛苦

Omnipotent

Excitation Spectra and Selection Rules in Crystals,thods to an investigation of the elementary excitations in crystals, which have many aspects in common. Among these there are phonons (lattice vibrations) and electronic excitations for which we discuss the symmetrized eigenvalue problem. Finally we study the selection rules for the electron-phonon,