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Mosc. Math. J., 2010 Volume 10, Number 1, Pages 139–188 (Mi mmj376)

This article is cited in 3 papers

Hodge correlators II

A. B. Goncharov

Brown University, Providence, RI, USA

Abstract: We define Hodge correlators for a compact Kähler manifold $X$. They are complex numbers which can be obtained by perturbative series expansion of a certain Feynman integral which we assign to $X$. We show that they define a functorial real mixed Hodge structure on the rational homotopy type of $X$.
The Hodge correlators provide a canonical linear map from the cyclic homomogy of the cohomology algebra of $X$ to the complex numbers.
If $X$ is a regular projective algebraic variety over a field $k$, we define, assuming the motivic formalism, motivic correlators of $X$. Given an embedding of $k$ into complex numbers, their periods are the Hodge correlators of the obtained complex manifold.
Motivic correlators lie in the motivic coalgebra of the field $k$. They come togerther with an explicit formula for their coproduct in the motivic Lie coalgebra.

Key words and phrases: mixed Hodge structure, cyclic homology, Feynman integral.

MSC: 14

Received: July 7, 2008; in revised form March 23, 2009

Language: English

DOI: 10.17323/1609-4514-2010-10-1-139-188



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