Brane quantization of $A_n$-resolutions

Abstract

We extend the study of brane quantization via SYZ mirror symmetry to the setting of singular fibers, building on recent joint work with Chan, Leung, and Li in the semi-flat case. We consider a crepant resolution $X\to {\mathbb{C}}^2/{\mathbb{Z}}_{n+1}$ of the $A_n$-singularity, whose mirror $\check{X}$ is also realized as a resolution of ${\mathbb{C}}^2/{\mathbb{Z}}_{n+1}$. For each level $k\in {\mathbb{Z}}_{>0}$, we construct a space filling coisotropic A-brane ${\mathcal{B}}_{cc}^{(k)}$ of $(X,k\ddot{I}‰)$ and determine its mirror B-brane ${\check{\mathcal{B}}}_{cc}^{(k)}$ via fiberwise geometric quantization. We then define the endomorphism algebra $Ho{m}_A({\mathcal{B}}_{cc}^{(k)},{\mathcal{B}}_{cc}^{(k)})$ by gluing analytic quantum tori using wall-crossing formulas and establish a mirror isomorphism $Ho{m}_A({\mathcal{B}}_{cc}^{(k)},{\mathcal{B}}_{cc}^{(k)})\cong Ho{m}_B({\check{\mathcal{B}}}_{cc}^{(k)},{\check{\mathcal{B}}}_{cc}^{(k)})$.

19 pages, 1 figure. Several typos are fixed. Remark 3.1, 3.3 and 3.9 has been modified. Comments are welcome!