Calculation of Resonance S-Matrix Poles by Means of Analytic Continuation in the Coupling Constant

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10371601" target="_blank" >RIV/00216208:11320/17:10371601 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4208/cicp.OA-2016-0068" target="_blank" >http://dx.doi.org/10.4208/cicp.OA-2016-0068</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4208/cicp.OA-2016-0068" target="_blank" >10.4208/cicp.OA-2016-0068</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Calculation of Resonance S-Matrix Poles by Means of Analytic Continuation in the Coupling Constant

Popis výsledku v původním jazyce

The method of analytic continuation in the coupling constant in combination with the use of statistical Pade approximation is applied to the determination of complex S-matrix poles, i.e. to the determination of resonance energy and widths. These parameters are of vital importance in many physical, chemical and biological processes. It is shown that an alternative to the method of analytic continuation in the coupling constant exists which in principle makes it possible to locate several resonances at once, in contrast to the original method which yields parameters of only one resonance. In addition the new approach appears to be less sensitive to the choice of the perturbation interaction used for the analytical continuation than the original method. In this paper both approaches are compared and tested for model analytic separable potential. It is shown that the new variant of the method of analytic continuation in the coupling constant is more robust and efficient than the original method and yields reasonable results even for data of limited accuracy.

Název v anglickém jazyce

Calculation of Resonance S-Matrix Poles by Means of Analytic Continuation in the Coupling Constant

Popis výsledku anglicky

The method of analytic continuation in the coupling constant in combination with the use of statistical Pade approximation is applied to the determination of complex S-matrix poles, i.e. to the determination of resonance energy and widths. These parameters are of vital importance in many physical, chemical and biological processes. It is shown that an alternative to the method of analytic continuation in the coupling constant exists which in principle makes it possible to locate several resonances at once, in contrast to the original method which yields parameters of only one resonance. In addition the new approach appears to be less sensitive to the choice of the perturbation interaction used for the analytical continuation than the original method. In this paper both approaches are compared and tested for model analytic separable potential. It is shown that the new variant of the method of analytic continuation in the coupling constant is more robust and efficient than the original method and yields reasonable results even for data of limited accuracy.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/GA16-17230S" target="_blank" >GA16-17230S: Teoretický popis molekulárních procesů v plazmatu stimulovaných elektronem.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Communications in Computational Physics

ISSN

1815-2406

e-ISSN

—

Svazek periodika

21

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CN - Čínská lidová republika

Počet stran výsledku

19

Strana od-do

1154-1172

Kód UT WoS článku

000396812700011

EID výsledku v databázi Scopus

2-s2.0-85014832957