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首页> 外文期刊>Journal of Experimental and Theoretical Physics >On the Summation of Divergent Perturbation Series in Quantum Mechanics and Field Theory
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On the Summation of Divergent Perturbation Series in Quantum Mechanics and Field Theory

机译:量子力学和场论中发散摄动级数的和

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The possibility of recovering the Gell-Mann-Low function in the asymptotic strong-coupling regime by known first-order perturbation-theory (PT) terms β_n and their asymptotics (β-tilde)_n as n → ∞ is investigated. Conditions are formulated that are necessary for recovering the required function at the physical level of rigor: (1) a large number of PT coefficients are known whose asymptotics has already been established, and (2) there is no intermediate asymptotics. Higher orders of PT, their asymptotic behavior, and power corrections are calculated in quantum mechanical problems that involve divergent PT series (including series for a funnel potential, the #Phi#_(0)~4 model, and the Stark effect in a strong field). The scalar field theory #Phi#_(4)~4 is considered in the (MS)-bar and MOM regularization schemes. It is shown that one cannot make any definite conclusion about the asymptotics of the Gell-Mann-Low function as g → ∞ on the basis of information available for the above theory.
机译:研究了通过已知的一阶扰动理论(PT)项β_n及其渐近性(β-tilde)_n为n→∞恢复渐近强耦合状态下Gell-Mann-Low函数的可能性。提出了在严格的物理水平上恢复所需功能所必需的条件:(1)已知已经建立渐近性的大量PT系数,(2)没有中间渐近性。在涉及发散的PT级数(包括漏斗级数,#Phi #_(0)〜4模型和强力的Stark效应)的量子力学问题中计算出更高阶的PT,它们的渐近行为和功率校正。领域)。在(MS)-bar和MOM正则化方案中考虑了标量场理论#Phi #_(4)〜4。结果表明,根据上述理论可用的信息,对于g→∞的Gell-Mann-Low函数的渐近性,不能做出任何确定的结论。

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