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Title: On the random phase approximation based on the thermo field dynamics formalism
Authors: Yamamura, Masatoshi 
Providência, João da 
Kuriyama, Atsushi 
Fiolhais, Carlos 
Keywords: Random phase approximation; Thermo field dynamics formalism; Many-body theory
Issue Date: 1990
Publisher: Physical Society of Japan
Citation: YAMAMURA, Masatoshi ; PROVIDÊNCIA, João da ; KURIYAMA, Atsushi ; FIOLHAIS, Carlos – On the random phase approximation based on the thermo field dynamics formalism. Progress of Theoretical Physics. Kyoto : Physical Society of Japan. ISSN 0033-068X. Vol. 83 (1990), p. 749-765.
Serial title, monograph or event: Progress of Theoretical Physics
Volume: 83
Place of publication or event: Kyoto
Abstract: A comparative stdy of the random phase approximation is reported in the case of the following three approches based on the thermo field dynamics formalism: (A) the Tanabe approach, (B) the Hatsuda approach and (C) the approach developed by the present authors. The basic viewpoint is to formulate the random phase approximation by picking up the quadratic terms with respect to bosons in the boson expansion theory for the thermo field dynamics formalism. It is concluded tha the approach (C) appears to be superior to the other two approaches.
ISSN: 0033-068X
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

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