Journal
PHYSICS LETTERS B
Volume 818, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2021.136369
Keywords
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Funding
- ELKH
- NKFIH [K134946, FK128789]
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In this study, we investigate the resurgent trans-series for the free energy of the two-dimensional O(4) sigma model in a magnetic field. By exploiting integrability, very high-order perturbative data is obtained, allowing exploration of non-perturbative sectors. Leading real-valued exponentially small terms are determined exactly and confirmed against direct numerical solutions, showing complete agreement.
We study the resurgent trans-series for the free energy of the two-dimensional O(4) sigma model in a magnetic field. Exploiting integrability, we obtain very high-order perturbative data, from which we can explore non-perturbative sectors. We are able to determine exactly the leading real-valued exponentially small terms, which we check against the direct numerical solution of the exact integral equation, and find complete agreement. (C) 2021 The Authors. Published by Elsevier B.V.
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