Calculation of Resonance S-Matrix Poles by Means of Analytic Continuation in the Coupling Constant
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Calculation of Resonance S-Matrix Poles by Means of Analytic Continuation in the Coupling Constant
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10300 - Physical sciences
Result continuities
Project
<a href="/en/project/GA16-17230S" target="_blank" >GA16-17230S: Theoretical description of electron-driven molecular processes in plasma.</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Communications in Computational Physics
ISSN
1815-2406
e-ISSN
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Volume of the periodical
21
Issue of the periodical within the volume
4
Country of publishing house
CN - CHINA
Number of pages
19
Pages from-to
1154-1172
UT code for WoS article
000396812700011
EID of the result in the Scopus database
2-s2.0-85014832957