U-duality and M-Theory
arXiv:hep-th/9809039 · doi:10.1016/S0370-1573(99)00004-6
Abstract
This work is intended as a pedagogical introduction to M-theory and to its maximally supersymmetric toroidal compactifications, in the frameworks of 11D supergravity, type II string theory and M(atrix) theory. U-duality is used as the main tool and guideline in uncovering the spectrum of BPS states. We review the 11D supergravity algebra and elementary 1/2-BPS solutions, discuss T-duality in the perturbative and non-perturbative sectors from an algebraic point of view, and apply the same tools to the analysis of U-duality at the level of the effective action and the BPS spectrum, with a particular emphasis on Weyl and Borel generators. We derive the U-duality multiplets of BPS particles and strings, U-duality invariant mass formulae for 1/2- and 1/4-BPS states for general toroidal compactifications on skew tori with gauge backgrounds, and U-duality multiplets of constraints for states to preserve a given fraction of supersymmetry. A number of mysterious states are encountered in D<=3, whose existence is implied by T-duality and 11D Lorentz invariance. We then move to the M(atrix) theory point of view, give an introduction to Discrete Light Cone Quantization (DLCQ) in general and DLCQ of M-theory in particular. We discuss the realization of U-duality as electric-magnetic dualities of the Matrix gauge theory, display the Matrix gauge theory BPS spectrum in detail, and discuss the conjectured extended U-duality group in this scheme.
132 pages, 37 tables, Latex2e; v3: minor corrections, text reformatted, update of refs, note added about boundaries of M-theory moduli space, final version to appear in Phys. Rept
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- Some finite terms from ladder diagrams in three and four loop maximal supergravity
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- A T-Fold Black Hole in Doubled Type IIB
- Spinorial geometry, horizons and superconformal symmetry in six dimensions
- Codimension-2 brane solutions of maximal supergravities in 9, 8, and 7 dimensions
- T-duality and entanglement entropy for NS five-branes
- Branes and Polytopes
- Duality and Combinatorics of Long Strings in ADS3
- Implication of U-duality for black branes in M/string theory
- Exact Non-Abelian Supertubes
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