English

Categorical mirror symmetry on cohomology for a complex genus 2 curve

Symplectic Geometry 2021-09-24 v3

Abstract

Motivated by observations in physics, mirror symmetry is the concept that certain manifolds come in pairs XX and YY such that the complex geometry on XX mirrors the symplectic geometry on YY. It allows one to deduce symplectic information about YY from known complex properties of XX. Strominger-Yau-Zaslow arXiv:hep-th/9606040 described how such pairs arise geometrically as torus fibrations with the same base and related fibers, known as SYZ mirror symmetry. Kontsevich arXiv:alg-geom/9411018 conjectured that a complex invariant on XX (the bounded derived category of coherent sheaves) should be equivalent to a symplectic invariant of YY (the Fukaya category, see references in article abstract). This is known as homological mirror symmetry. In this project, we first use the construction of "generalized SYZ mirrors" for hypersurfaces in toric varieties following Abouzaid-Auroux-Katzarkov arXiv:1205.0053v4, in order to obtain XX and YY as manifolds. The complex manifold is the genus 2 curve Σ2\Sigma_2 (so of general type c1<0c_1<0) as a hypersurface in its Jacobian torus. Its generalized SYZ mirror is a Landau-Ginzburg model (Y,v0)(Y,v_0) equipped with a holomorphic function v0:YCv_0:Y \to \mathbb{C} which we put the structure of a symplectic fibration on. We then describe an embedding of a full subcategory of DbCoh(Σ2)D^bCoh(\Sigma_2) into a cohomological Fukaya-Seidel category of YY as a symplectic fibration. While our fibration is one of the first nonexact, non-Lefschetz fibrations to be equipped with a Fukaya category, the main geometric idea in defining it is the same as in Seidel's construction for Fukaya categories of Lefschetz fibrations and in Abouzaid-Seidel.

Keywords

Cite

@article{arxiv.1908.04227,
  title  = {Categorical mirror symmetry on cohomology for a complex genus 2 curve},
  author = {Catherine Cannizzo},
  journal= {arXiv preprint arXiv:1908.04227},
  year   = {2021}
}

Comments

Accepted manuscript to Advances in Mathematics. 103 pages, 25 figures