Quantum sheaf cohomology on Grassmannians

Understand

In this paper we study the quantum sheaf cohomology of Grassmannians with deformations of the tangent bundle.

• Quantum sheaf cohomology is a (0,2) deformation of the ordinary quantum cohomology ring, realized as the OPE ring in A/2-twisted theories.
• Quantum sheaf cohomology has previously been computed for abelian gauged linear sigma models (GLSMs); here, we study (0,2) deformations of nonabelian GLSMs, for which previous methods have been intractable.
• Combined with the classical result, the quantum ring structure is derived from the one-loop effective potential.