The Heisenberg algebra is defined as xy−yx=iw(x,y), with w the symplectic form. For a symplectic manifold, we can define an infinite dimensional representation of the Heisenberg algebra, the Weil representation, in the case of a metaplectic structure. We define the C-metaplectic group as:
C−Mp(2n)=Mp(2n)×S1/{1,−1}
with Mp(2n) the metaplectic group, a two fold covering space of the symplectic group Sp(2n).
Then, we can define the symplectic Seiberg-Witten equations with help of the symplectic Dirac operator as defined by Habermann (Lecture Notes in Mathematics 1887).
DAw(ψ)=0
F(A)(x,y)=iw(x,y)<ψ,ψ>
with DAw the symplectic Dirac operator and A, the connection of the line bundle. F(A) is the curvature of the connection A.
Can we define symplectic Seiberg-Witten invariants?