A Quantum H*(T)-module via Quasimap Invariants
Time: 2024-09-19
Published By: Ruixin Li
Speaker(s): Jae Hwang Lee (BICMR)
Time: 14:00-15:00 October 22, 2024
Venue: Room 29, Quan Zhai, BICMR
Abstract: For X a smooth projective variety, the quantum cohomology ring QH*(X) is a deformation of the usual cohomology ring H*(X), where the product structure is modified to incorporate quantum corrections. These correction terms are defined using Gromov--Witten invariants. When X is toric with geometric quotient description V//T, the cohomology ring H*(V//T) also has the structure of a H*(T)-module. In this paper, we introduce a new deformation of the cohomology of X using quasimap invariants with a light point. This defines a quantum H*(T)-module structure on H*(X) through a modified version of the WDVV equations. We explicitly compute this structure for the Hirzebruch surface of type 2. We conjecture that this new quantum module structure is isomorphic to the natural module structure of the Batyrev ring for a semipositive toric variety.