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arXiv · 1309.3750

Reconstruction and Convergence in Quantum $K$-Theory via Difference Equations

Hiroshi Iritani·Todor Milanov·Valentin Tonita
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Abstract

We give a new reconstruction method of big quantum $K$-ring based on the $q$-difference module structure in quantum $K$-theory. The $q$-difference structure yields commuting linear operators $A_{i,\rm com}$ on the $K$-group as many as the Picard number of the target manifold. The genus-zero quantum $K$-theory can be reconstructed from the $q$-difference structure at the origin $t=0$ if the $K$-group is generated by a single element under the actions of $A_{i,\rm com}$. This method allows us to prove the convergence of the big quantum $K$-rings of certain manifolds, including the projective spaces and the complete flag manifold $\operatorname{Fl}_3$.

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Hiroshi Iritani, Todor Milanov, Valentin Tonita. 2014-02-03. Reconstruction and Convergence in Quantum $K$-Theory via Difference Equations. https://doi.org/10.1093/imrn%2Frnu026

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