Common approximations in many-body systems
Keyword(s):
A new way of presenting the random phase and ladder approximations is introduced which provides a convenient, probabilistic classification scheme and makes the fundamental nature of these approximations transparent. The physical interpretation of these approximations is reviewed in the light of this new method of presentation and the natural propagators to be associated with each approximation are discussed.
1991 ◽
Vol 05
(20)
◽
pp. 3235-3253
◽
2008 ◽
Vol 17
(supp01)
◽
pp. 304-317
Keyword(s):
Keyword(s):
Keyword(s):