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A Note On Projective Structures On Compact Surfaces (2409.01810v2)

Published 3 Sep 2024 in hep-th, math-ph, math.CV, math.DG, and math.MP

Abstract: Projective structures on topological surfaces support the structure of 2d CFTs with a degree of technical simplification. We propose a complex analytic space $\mathcal{P}g$ biholomorphic to $T*{(1,0)} \mathcal{M}g$ as a candidate moduli space of the projective structures of the genus $g$ topological surface. Explicit analysis at $g=1$, including of the fibers over the fictitious orbifold loci of $\mathcal{M}{g=1}$ and of transformations under the modular group, supports this proposal. It also shows that $\mathcal{P}{g=1}$ naturally resolves the orbifold locus of the affine structure moduli space $\mathcal{A}{g=1}$ which is related to the Hodge bundle over $\mathcal{M}_{g=1}$. For $g \geq 2$, intricate quotient operations are expected along fibers over the orbifold loci of $\mathcal{M}_g$, whose analysis we leave to future work. Physically, the space $\mathcal{P}_g$ represents the bundle of universal, stationary, chiral hydrodynamic flows spatially confined to compact genus-$g$ Riemann surfaces.

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