Eta-invariants and anomalies in U(1)-Chern-Simons theory

Details Eta-invariants and anomalies in U(1)-Chern-Simons theory Eta-invariants and anomalies in U(1)-Chern-Simons theory

2010-04-16

arxiv.org/abs/1004.2913v1

Mathematics

Symplectic Geometry

27 pages

Scientific paper

This paper studies U(1)-Chern-Simons theory and its relation to a construction of Chris Beasley and Edward Witten. The natural geometric setup here is that of a three-manifold with a Seifert structure. Based on a suggestion of Edward Witten we are led to study the stationary phase approximation of the path integral for U(1)-Chern-Simons theory after one of the three components of the gauge field is decoupled. This gives an alternative formulation of the partition function for U(1)-Chern-Simons theory that is conjecturally equivalent to the usual U(1)-Chern-Simons theory. The goal of this paper is to establish this conjectural equivalence rigorously through appropriate regularization techniques. This approach leads to some rather surprising results and opens the door to studying hypoelliptic operators and their associated eta invariants in a new light.

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