Strong-coupling series for PT-symmetric quantum field theory
A graphical procedure to obtain strong-coupling expansions for -symmetric quantum field theory (QFT) is introduced. Strong-coupling series have two advantages over weak-coupling series: (i) every strong-coupling graph can be calculated exactly in any spacetime dimension D; weak-coupling graphs requi...
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| Autori principali: | , |
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| Natura: | Article (Journal) Editorial |
| Lingua: | inglese |
| Pubblicazione: |
18 May 2026
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| In: |
Journal of physics. A, Mathematical and theoretical
Year: 2026, Volume: 59, Fascicolo: 20, Pages: ? |
| ISSN: | 1751-8121 |
| DOI: | 10.1088/1751-8121/ae6a4e |
| Accesso online: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/1751-8121/ae6a4e
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| Note sull'autore: | Carl M Bender and SP Klevansky |
| Riassunto: | A graphical procedure to obtain strong-coupling expansions for -symmetric quantum field theory (QFT) is introduced. Strong-coupling series have two advantages over weak-coupling series: (i) every strong-coupling graph can be calculated exactly in any spacetime dimension D; weak-coupling graphs require numerical evaluation of difficult transcendental integrals. (ii) Strong-coupling series converge and give accurate numerical results but weak-coupling series diverge, so asymptotic summation methods are used to extract information. The techniques discussed here are general and work for any QFT, Hermitian or symmetric, but for brevity this paper focuses on low-dimensional -symmetric QFT. |
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| Descrizione del documento: | Gesehen am 31.07.2026 |
| Descrizione fisica: | Online Resource |
| ISSN: | 1751-8121 |
| DOI: | 10.1088/1751-8121/ae6a4e |