Refined Analytic Torsion on Manifolds with Boundary

Details Refined Analytic Torsion on Manifolds with Boundary Refined Analytic Torsion on Manifolds with Boundary

2008-08-04

arxiv.org/abs/0808.0416v2

Mathematics

Differential Geometry

Some references were corrected. 30 pages

Scientific paper

The refined analytic torsion, defined by M. Braverman and T. Kappeler on closed manifolds, can be viewed as a refinement of the Ray-Singer torsion, since it is a canonical choice of an element with Ray-Singer norm one, in case of unitary representations. The complex phase of the refinement is given by the rho-invariant of the odd-signature operator. Unfortunately there seems to be no canonical way to extend the construction of Braverman and Kappeler to compact manifolds with boundary. In particular a gluing formula seems to be out of reach. We propose a different refinement of analytic torsion, similar to Braverman and Kappeler, which does apply to compact manifolds with and without boundary. In a subsequent publication we establish a gluing formula for our construction, which in fact can also be viewed as a gluing law for the original definition of refined analytic torsion by Braverman and Kappeler.

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