Convergent series in variational perturbation theory

The problem of convergenof series of the variational perturbation theory isanalyzed for the λλφ 4 ( d) -model. It is shown that there exist such methods of choosing variational additions that lead to convergent series for any values of the coupling constants.

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Bibliographic Details
Published in:Physics letters. B 1992-12, Vol.297 (3), p.305-308
Main Authors: Sissakian, A.N., Solovtsov, I.L., Shevchenko, O.Yu
Format: Article
Language:English
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Summary:The problem of convergenof series of the variational perturbation theory isanalyzed for the λλφ 4 ( d) -model. It is shown that there exist such methods of choosing variational additions that lead to convergent series for any values of the coupling constants.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(92)91267-D