The Green functions are especially useful for summing over the restricted classes of perturbation theory of diagrams, and are very powerful when combined with spectral representations. They play the most important part in the field-theoretical treatment of the many-body problem, and they are flexible enough to describe the effects of retarded interactions and all quantities of physical interest like thermodynamic properties can be derived from them. There are different types of Green functions, or propagators: One particle, two-particle, ..., n particle, advanced, retarded, zero-temperature, finite-temperature, real-time, imaginary time, and so on. The Green's functions enjoy popularity because they yield, in a direct way, the most important physical properties in a systematic way. Among the types, we prefer the retarded double-time Green's function (GF) for our theoretical work because this implies the principle of causality.
Product Identifiers
Publisher
Lap Lambert Academic Publishing
ISBN-13
9783847313229
eBay Product ID (ePID)
113953710
Product Key Features
Author
Moges Tsega
Publication Name
Co-Existence of Superconductivity and Ferromagnetism in PR Doped Ybco
Format
Paperback
Language
English
Subject
Physics
Publication Year
2011
Type
Textbook
Number of Pages
72 Pages
Dimensions
Item Height
229mm
Item Width
152mm
Item Weight
118g
Additional Product Features
Title_Author
Moges Tsega
Country/Region of Manufacture
Germany
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