Exact WKB analysis and cluster algebras
Abstract
We develop the mutation theory in the exact WKB analysis using the framework of cluster algebras. Under a continuous deformation of the potential of the Schr\"odinger equation on a compact Riemann surface, the Stokes graph may change the topology. We call this phenomenon the mutation of Stokes graphs. Along the mutation of Stokes graphs, the Voros symbols, which are monodromy data of the equation, also mutate due to the Stokes phenomenon. We show that the Voros symbols mutate as variables of a cluster algebra with surface realization. As an application, we obtain the identities of Stokes automorphisms associated with periods of cluster algebras. The paper also includes an extensive introduction of the exact WKB analysis and the surface realization of cluster algebras for nonexperts.
Cite
@article{arxiv.1401.7094,
title = {Exact WKB analysis and cluster algebras},
author = {Kohei Iwaki and Tomoki Nakanishi},
journal= {arXiv preprint arXiv:1401.7094},
year = {2014}
}
Comments
v1:88 pages. v2: 98 pages. Appendix B added and minor revisions. v3: 100 pages. The notion of labeled Stokes triangulation changed; accordingly, Sections 5.3, 5.5, 6.1, 6.2, 6.3, 6.6, 8.3 modified. v4: 104 pages, minor revisions, the version to appear in J. Phys. A