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[en] This paper discusses the Schwinger-Dyson (SD) equations in QED at non-zero temperature. The β-function in local limit and at high temperature limit is found
Journal
[en] We describe briefly the effects of the running coupling strength, the current quark mass, the temperature and density on the QCD phase structure and its transition in the framework of Dyson-Schwinger equation approach of QCD. With a simple model, we show that the chiral susceptibility can identify the stability of the vacuum and plays an important role in describing the QCD phase transition. (author)
Journal
International Journal of Modern Physics E; ISSN 0218-3013; 
; v. 17(9); p. 1965-1978
; v. 17(9); p. 1965-1978
[en] It is shown by a direct and simple method and in a model-independent way the important fact that the subtractions of the improved Dyson-Salam scheme, as carried out directly in momentum space, are equivalent to adding counterterms to the interaction Lagrangian density. The simplicity in the demonstration hinges upon a basic property of the structure of subtractions. (author)
Journal
Nuovo Cimento. A; ISSN 0369-3546; ; v. 53(3); p. 345-358
; v. 53(3); p. 345-358
[en] Because of its finiteness of boson expansion, the Dyson boson theory is known to allow one to calculate matrix elements in the boson space much easier than the Holstein-Primakoff Hermitian boson theory. The demerit of the Dyson boson theory is in the non-Hermiticity of the eigenvalue problem. Here it is shown that it is possible to make the eigenvalue problem Hermitian and to make the Dyson boson theory more manageable for practical use
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