Correlation functions of the anharmonic oscillator: Numerical verification of two-loop corrections to the large-order behavior

Correlation functions of the anharmonic oscillator: Numerical verification of two-loop corrections to the large-order behavior
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非简谐振子的相关函数:对大阶行为的双环修正的数值验证

DOI:
10.1103/physrevd.105.105012
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发表时间:
2022
期刊:
影响因子:
5
通讯作者:
Zinn-Justin, Jean
Zinn-Justin, Jean
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Giorgini, Ludovico T.;Jentschura, Ulrich D.;Malatesta, Enrico M.;Parisi, Giorgio;Rizzo, Tommaso;Zinn-Justin, Jean

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最近,我们分析了非谐振子关联函数的高阶行为[L。T. Giorginiet等人,Phys. Rev. D 101,125001(2020)PRVDAQ 2470 -001010.1103/PhysRevD.101.125001]。得到了配分函数、两点和四点配分函数以及两点配分函数在零动量转移下的导数的双圈修正。在这里,我们试图验证所获得的分析结果对高阶系数的数值计算,andosillator,我们证明了大幅改善的协议的高阶渐近估计和微扰理论后,列入两个循环的修正,以大订单的行为。
Recently, the large-order behavior of correlation functions of the-anharmonic oscillator has been analyzed by us [L. T. Giorginiet al., Phys. Rev. D 101, 125001 (2020)PRVDAQ2470-001010.1103/PhysRevD.101.125001]. Two-loop corrections about the instanton configurations were obtained for the partition function, the two-point and four-point functions, and the derivative of the two-point function at zero momentum transfer. Here, we attempt to verify the obtained analytic results against numerical calculations of higher-order coefficients for the,, andoscillators, and we demonstrate the drastic improvement of the agreement of the large-order asymptotic estimates and perturbation theory upon the inclusion of the two-loop corrections to the large-order behavior.
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