Brane compactifications and 4-dimensional geometry in the IKKT model

Autor(en)

Alexios P. Polychronakos, Harold Steinacker, Jochen Zahn

Abstrakt

We study in detail certain brane solutions with compact extra dimensions M^4 x K in the IKKT matrix model, with K being a two-dimensional rotating torus embedded in R^6. We focus on the compactification moduli and the fluctuations of K \subset R^6 and their physical significance. Mediated by the Poisson tensor, they contribute to the effective 4-dimensional metric on the brane, and thereby become gravitational degrees of freedom. We show that the zero modes corresponding to the global symmetries of the model lead to Ricci-flat 4-dimensional metric perturbations, wherever the energy-momentum tensor vanishes. Their coupling to the energy momentum tensor depends on the extrinsic curvature of the brane.

Organisation(en)

Mathematische Physik

Externe Organisation(en)

City University of New York

Journal

Nuclear Physics, Section B

Band

875

Seiten

566-598

Anzahl der Seiten

33

ISSN

0550-3213

DOI

https://doi.org/10.1016/j.nuclphysb.2013.07.017

Publikationsdatum

10-2013

Peer-reviewed

Ja

ÖFOS 2012

103036 Theoretische Physik, 103019 Mathematische Physik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/0b8159db-5b24-4cbf-936c-1bb8ec5eff3f