The curvature of branes, currents and gravity in matrix models

Abstract

The curvature of brane solutions in Yang-Mills matrix models is expressed in terms of conserved currents associated with global symmetries of the model. This implies a relation between the Ricci tensor and the energy-momentum tensor due to the basic matrix model action, without invoking an Einstein-Hilbert term. The coupling is governed by the extrinsic curvature of the brane embedding, which arises naturally for compactified brane solutions. The effective gravity on the brane is thereby related to the compactification moduli, and protected from quantum corrections due to the relation with global symmetries.

arXiv comment28 pages. V2: typos fixed, published version

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Cited by in corpus (7)

• Covariant cosmological quantum space-time, higher-spin and gravity in the IKKT matrix model
• 2D fuzzy Anti-de Sitter space from matrix models
• Emergent gravity on covariant quantum spaces in the IKKT model
• Kähler structure in the commutative limit of matrix geometry
• Brane compactifications and 4-dimensional geometry in the IKKT model
• Dirac equation on coordinate dependent noncommutative space-time
• Contravariant Gravity on Poisson Manifolds and Einstein Gravity