nLab
exceptional generalized geometry

Context

Differential geometry

differential geometry

synthetic differential geometry

Axiomatics

Models

Concepts

Theorems

Applications

Contents

Idea

A variant of the idea of generalized complex geometry given by passing from generalization of complex geometry to generalization of exceptional geometry. Instead of by reduction of structure groups along inclusions like O(d)×O(d)O(d,d)O(d)\times O(d) \to O(d,d) it is controled by incusions of into split real forms of exceptional Lie groups.

This serves to neatly encode U-duality groups in supergravity as well as higher supersymmetry of supergravity compactifications.

Examples

Higher supersymmetry

Compactification of 11-dimensional supergravity on a manifold of dimension 7 preserves N=1N = 1 supersymmetry precisely if its generalized tangent bundle has G-structure for the inclusion

SU(7)E 7(7) SU(7) \hookrightarrow E_{7(7)}

of the special unitary group in dimension 7 into the split real form of E7. This is shown in (Pacheco-Waldram).

One dimension down, compactification of 10-dimensional type II supergravity on a 6-manifold XX preserves N=2N = 2 supersymmetry precisely if the generalized tangent bundle TXT *XT X \otimes T^* X in the NS-NS sector admits G-structure for the inclusion

SU(3)×SU(3)O(6,6). SU(3) \times SU(3) \hookrightarrow O(6,6) \,.

This is reviewed in (GLSW, section 2).

References

General

  • David Baraglia, Leibniz algebroids, twistings and exceptional generalized geometry (arXiv:1101.0856)

In supergravity

Survey slides include

  • David Baraglia, Exceptional generalized geometry and N=2N = 2 backgrounds (pdf)

Reviewes include

  • Daniel Persson, Arithmetic and Hyperbolic Structures in String Theory (arXiv:1001.3154)

  • Nassiba Tabti, Kac-Moody algebraic structures in supergravity theories (arXiv:0910.1444)

Original articles include

The E10-geometry of 11-dimensional supergravity compactified to the line is discussed in

The E11-geometry of 11-dimensional supergravity compactified to the point is discussed in

The generalized-U-duality+diffeomorphsim invariance in 11d is discussed in

For the worldvolume theory of the M5-brane this is discussed in

  • Machiko Hatsuda, Kiyoshi Kamimura, M5 algebra and SO(5,5)SO(5,5) duality (arXiv:1305.2258)

Revised on May 13, 2013 14:41:56 by Urs Schreiber (89.204.130.227)