Determination of electronic resonances by analytic continuation using barycentric formula

被引：0

作者：

Curik, Roman ^{[1
]}

Horacek, Jiri ^{[2
]}

机构：

[1] ASCR, J Heyrovsky Inst Phys Chem, Dolejskova 3, Prague 18223, Czech Republic

[2] Charles Univ Prague, Inst Theoret Phys, Fac Math & Phys, V Holesovickach 2, CR-18000 Prague, Czech Republic

来源：

COMPUTER PHYSICS COMMUNICATIONS | 2025年 / 306卷

关键词：

Electron resonance; Analytic continuation; Interpolation; COUPLING-CONSTANT METHOD; SHAPE RESONANCE; ENERGIES; ALGORITHM; APPROXIMATION; STABILIZATION; INTERPOLATION; SCATTERING; LIFETIMES; WIDTHS;

D O I：

10.1016/j.cpc.2024.109379

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Numerical analytical continuation of a function is used to determine its complex roots. The analytical continuation is carried out by means of a barycentric formula. From the knowledge of the complex roots the energy and width of shape resonances as well as of quantum virtual states can be determined. The roots are calculated for several realistic models and the results are compared with other approaches. We also explore and discuss a stability of the predicted resonant roots with respect to changes of the perturbation potential.

引用

页数：9

共 28 条

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