Special Issue: Proceedings of the Workshop on Quantum Gravity and Noncommutative GeometryNo Access

NONCOMMUTATIVE SCALAR FIELD MINIMALLY COUPLED TO GRAVITY

ORFEU BERTOLAMI

Instituto Superior Técnico, Departamento de Física, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal

https://doi.org/10.1142/S0217732305017810Cited by:3 (Source: Crossref)

Abstract

A model for noncommutative scalar fields coupled to gravity based on the generalization of the Moyal product is proposed. Solutions compatible with homogeneous and isotropic flat Robertson-Walker spaces to first non-trivial order in the perturbation of the star-product are presented. It is shown that in the context of a typical chaotic inflationary scenario, at least in the slow-roll regime, noncommutativity yields no observable effect.

Talk presented at the Workshop on Quantum Gravity and Noncommutative Geometry, 20-23 July 2004, Universidade Lusófona, Lisbon, Portugal.

Dedicated to the memory of Luís Guisado

Keywords:

PACS: 98.80-Cq, 04.50+h

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