Note on the Generating Function of Two-Time Green Functions
- 1 July 1964
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics
- Vol. 32 (1) , 50-64
- https://doi.org/10.1143/ptp.32.50
Abstract
A new approach to the two-time Green function method is proposed. In order to give a systematic way of decoupling the two-time Green functions and to overcome the difficulties often encountered in terminating the hierarchy of Green functions, a generating function is introduced and its properties are examined in detail for a simple model. It is shown that the generating function provides poweful tool even in the case where conventional approximation for Green functions does not work. An example of the generating function is constructed for Fermion system with two-body interaction.Keywords
This publication has 1 reference indexed in Scilit:
- DOUBLE-TIME GREEN FUNCTIONS IN STATISTICAL PHYSICSSoviet Physics Uspekhi, 1960