منابع مشابه
High Temperature Resummation in the Linear δ-Expansion
The optimized linear δ-expansion is applied to the λφ theory at high temperature. Using the imaginary time formalism the thermal mass is evaluated perturbatively up to order δ. A variational procedure associated with the method generates nonperturbative results which are used to obtain the critical temperature for the phase transition. Our results are compared with the ones given by propagator ...
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Starch is one of the most widely used biopolymers in water based drilling fluids to control fluid loss. The thermal stability of starch in common drilling fluids is low (93 °C). In this study, the thermal stability of starch has been evaluated in sodium/potassium formate and potassium chloride fluids. Samples of mud were prepared by formate salts (sodium and potassium) and potassium chloride wi...
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We apply the δ-expansion perturbation scheme to the λφ4 self-interacting scalar field theory in 3+1 D at finite temperature. In the δ-expansion the interaction term is written as λ(φ2)1+δ and δ is considered as the perturbation parameter. We compute within this perturbative approach the renormalized mass at finite temperature at a finite order in δ. The results are compared with the usual loop-...
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ژورنال
عنوان ژورنال: Calphad
سال: 2015
ISSN: 0364-5916
DOI: 10.1016/j.calphad.2015.10.010