Spinors, Lagrangians and rank 2 Higgs bundles

Author: 

Hitchin, N

Publication Date: 

20 May 2016

Last Updated: 

2021-02-12T11:32:18.46+00:00

abstract: 

The paper considers the Dirac operator on a Riemann surface coupled to a symplectic holomorphic vector bundle W. Each spinor in the null-space generates through the moment map a Higgs bundle, and varying W one obtains a holomorphic Lagrangian subvariety in the moduli space of Higgs bundles. Applying this to the irreducible symplectic representations of SL(2) we obtain Lagrangian submanifolds of the rank 2 moduli space which link up with m-period points on the Prym variety of the spectral curve as well as Brill-Noether loci on the moduli space of semistable bundles. The case of genus 2 is investigated in some detail.

Symplectic id: 

1161181

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Submitted to ORA: 

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Publication Type: 

59