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Giorgini, Ludovico TheoStockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Nordita SU; Stockholm Univ, S-10691 Stockholm, Sweden.
(författare)
Correlation functions of the anharmonic oscillator : Numerical verification of two-loop corrections to the large-order behavior
- Artikel/kapitelEngelska2022
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American Physical Society (APS),2022
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LIBRIS-ID:oai:DiVA.org:kth-315251
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-315251URI
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https://doi.org/10.1103/PhysRevD.105.105012DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-206879URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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QC 20220704
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Recently, the large-order behavior of correlation functions of the O(N)-anharmonic oscillator has been analyzed by us [L. T. Giorgini et al., Phys. Rev. D 101, 125001 (2020)]. 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 O(1), O(2), and O(3) oscillators, 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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Jentschura, Ulrich D.Missouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA.;MTA Particle Phys Res Grp, POB 51, H-4001 Debrecen, Hungary.
(författare)
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Malatesta, Enrico M.Bocconi Univ, Dept Comp Sci, Via Sarfatti 25, I-20136 Milan, Italy.;Bocconi Univ, Artificial Intelligence Lab, I-20136 Milan, Italy.;Bocconi Univ, Inst Data Sci & Analyt, I-20136 Milan, Italy.
(författare)
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Parisi, GiorgioSapienza Univ Roma, Dipartimento Fis, Ple Aldo Moro 5, I-00185 Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 5, I-00185 Rome, Italy.;Inst Nanotechnol NANOTEC CNR, Rome Unit, Ple Aldo Moro 5, I-00185 Rome, Italy.
(författare)
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Rizzo, TommasoInst Complex Syst ISC CNR, Rome Unit, Ple Aldo Moro 5, I-00185 Rome, Italy.;Sapienza Univ Roma, Dipartimento Fis, Ple Aldo Moro 5, I-00185 Rome, Italy.
(författare)
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Zinn-Justin, JeanParis Saclay, IRFU CEA, F-91191 Gif Sur Yvette, France.
(författare)
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Stockholms universitetNordiska institutet för teoretisk fysik (Nordita)
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Physical Review D: American Physical Society (APS)105:102470-00102470-0029
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