From perturbative to non-perturbative in the O(4) sigma model
نویسندگان
چکیده
We study the resurgent trans-series for free energy of two-dimensional O(4) sigma model in a magnetic field. Exploiting integrability, we obtain very high-order perturbative data, from which can explore non-perturbative sectors. are able to determine exactly leading real-valued exponentially small terms, check against direct numerical solution exact integral equation, and find complete agreement.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2021
ISSN: ['0370-2693', '1873-2445']
DOI: https://doi.org/10.1016/j.physletb.2021.136369