Optimized perturbation theory at finite temperature
نویسندگان
چکیده
منابع مشابه
Optimized Perturbation Theory at Finite Temperature
An optimized perturbation theory (OPT) at finite temperature T , which resums higher order terms in the naive perturbation, is developed in O(N) φ theory. It is proved that (i) the renormalization of the ultra-violet divergences can be carried out systematically in any given order of OPT, and (ii) the Nambu-Goldstone theorem is fulfilled for arbitrary N and for any given order of OPT. The metho...
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We study the optimized perturbation theory (OPT) at finite temperature, which is a selfconsistent resummation method. Firstly, we generalize the idea of the OPT to optimize the coupling constant in λφ theory, and give a proof of the renormalizability of this generalized OPT. Secondly, the principle of minimal sensitivity and the criterion of the fastest apparent convergence, which are condition...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.58.076001