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- W2061698995 abstract "The set of coupled equations for the self-consistent propagator and the field expectation value is solved numerically with high accuracy in Euclidean space at zero temperature and in the broken symmetry phase of the ${ensuremath{phi}}^{4}$ model. Explicitly finite equations are derived with the adaptation of the renormalization method of van Hees and Knoll [H. van Hees and J. Knoll, Phys. Rev. D 65, 025010 (2001).] to the case of nonvanishing field expectation value. The set of renormalization conditions used in this method leads to the same set of counterterms obtained recently by Patk'os and Sz'ep in [A. Patk'os and Zs. Sz'ep, Nucl. Phys. A811, 329 (2008).]. This makes possible the direct comparison of the accurate solution of explicitly finite equations with the solution of renormalized equations containing counterterms. The numerically efficient way of solving iteratively these latter equations is obtained by deriving at each order of the iteration new counterterms which evolve during the iteration process towards the counterterms determined based on the asymptotic behavior of the converged propagator. As shown at different values of the coupling, the use of these evolving counterterms accelerates the convergence of the solution of the equations." @default.
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- W2061698995 date "2011-09-01" @default.
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- W2061698995 title "Broken symmetry phase solution of the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msup><mml:mi>ϕ</mml:mi><mml:mn>4</mml:mn></mml:msup></mml:math>model at two-loop level of the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>Φ</mml:mi></mml:math>-derivable approximation" @default.
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- W2061698995 doi "https://doi.org/10.1103/physrevd.84.056001" @default.
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