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EnglishIn quantum mechanics and quantum field theory perturbation theory generically requires the inclusion of extra contributions nonperturbative in the coupling, such as instantons, to reproduce exact results. We show how full nonperturbative results can be encoded in a suitable modified perturbative series in a class of quantum mechanical problems. We illustrate this explicitly in examples which are known to contain nonperturbative effects, such as the (supersymmetric) double-well potential, the pure anharmonic oscillator, and the perturbative expansion around a false vacuum.
Instantons from perturbation theory / Serone, Marco; Spada, Gabriele; Villadoro, Giovanni. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 96:2(2017), pp. 1-5. [10.1103/PhysRevD.96.021701]
| Titolo: | Instantons from perturbation theory | |
| Autori: | Serone, Marco; Spada, Gabriele; Villadoro, Giovanni | |
| Rivista: | ||
| Data di pubblicazione: | 2017 | |
| Volume: | 96 | |
| Fascicolo: | 2 | |
| Pagina iniziale: | 1 | |
| Pagina finale: | 5 | |
| Numero di Articolo: | 021701 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevD.96.021701 | |
| URL: | http://harvest.aps.org/bagit/articles/10.1103/PhysRevD.96.021701/apsxml https://arxiv.org/abs/1612.04376 | |
| Appare nelle tipologie: | 1.1 Journal article |
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| PhysRevD.96.021701.pdf | Versione Editoriale (PDF) | Non specificato | Administrator Richiedi una copia |
http://hdl.handle.net/20.500.11767/59022
