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High Energy Physics - Theory

arXiv:1003.4134 (hep-th)
[Submitted on 22 Mar 2010 (v1), last revised 25 Aug 2011 (this version, v5)]

Title:Emergent Geometry and Gravity from Matrix Models: an Introduction

Authors:Harold Steinacker
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Abstract:A introductory review to emergent noncommutative gravity within Yang-Mills Matrix models is presented. Space-time is described as a noncommutative brane solution of the matrix model, i.e. as submanifold of \R^D. Fields and matter on the brane arise as fluctuations of the bosonic resp. fermionic matrices around such a background, and couple to an effective metric interpreted in terms of gravity. Suitable tools are provided for the description of the effective geometry in the semi-classical limit. The relation to noncommutative gauge theory and the role of UV/IR mixing is explained. Several types of geometries are identified, in particular "harmonic" and "Einstein" type of solutions. The physics of the harmonic branch is discussed in some detail, emphasizing the non-standard role of vacuum energy. This may provide new approach to some of the big puzzles in this context. The IKKT model with D=10 and close relatives are singled out as promising candidates for a quantum theory of fundamental interactions including gravity.
Comments: Invited topical review for Classical and Quantum Gravity. 57 pages, 5 figures. V2,V3: minor corrections and improvements. V4,V5: some improvements, refs added
Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc)
Report number: UWTHPh-2010-4
Cite as: arXiv:1003.4134 [hep-th]
  (or arXiv:1003.4134v5 [hep-th] for this version)
  https://doi.org/10.48550/arXiv.1003.4134
Journal reference: Class.Quant.Grav.27:133001,2010
Related DOI: https://doi.org/10.1088/0264-9381/27/13/133001

Submission history

From: Harold Steinacker [view email]
[v1] Mon, 22 Mar 2010 11:27:42 UTC (156 KB)
[v2] Tue, 27 Apr 2010 15:02:46 UTC (156 KB)
[v3] Tue, 18 Jan 2011 08:14:16 UTC (156 KB)
[v4] Fri, 18 Mar 2011 09:17:11 UTC (156 KB)
[v5] Thu, 25 Aug 2011 15:32:20 UTC (156 KB)
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