Exact renormalization group and Φ-derivable approximations
نویسندگان
چکیده
منابع مشابه
Renormalization of Self-consistent Φ-derivable Approximations∗
Within finite temperature field theory, we show that truncated non-perturbative self-consistent Dyson resummation schemes can be renormalized with local vacuum counterterms. For this the theory has to be renormalizable in the usual sense and the self-consistent scheme must follow Baym’s Φ-derivable concept. Our BPHZ-renormalization scheme leads to renormalized self-consistent equations of motio...
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We discuss the method of Φ-derivable approximations in gauge theories. There, two complications arise, namely the violation of Bose symmetry in correlation functions and the gauge dependence. For the latter we argue that the error introduced by the gauge dependent terms is controlled, therefore not invalidating the method.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2011
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2010.12.058