Mathematical Research Letters

Volume 7, Issue 4, July 2000 pp. 517-535.

Twisted Higgs bundles and the fundamental group of compact Kähler manifolds

Authors: O. García-Prada and S. Ramanan
Author institution: Universidad Autónoma de Madrid, and Tata Institute of Fundamental Research

Summary: We study polystable Higgs bundles twisted by a line bundle over a compact Kähler manifold. These form a Tannakian category when the first and second Chern classes of the bundle are zero. In this paper we identify the corresponding Tannaka group in the case in which the line bundle is of finite order. This group is described in terms of the pro-reductive completion of the fundamental group of the manifold, and the character associated to the line bundle.

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