An Exceptional Algebraic Origin of the AdS/CFT Yangian Symmetry
High Energy Physics - Theory
2014-11-18 v3
Abstract
In the su(2|2) spin chain motivated by the AdS/CFT correspondence, a novel symmetry extending the superalgebra su(2|2) into u(2|2) was found. We pursue the origin of this symmetry in the exceptional superalgebra d(2,1;epsilon), which recovers su(2|2) when the parameter epsilon is taken to zero. Especially, we rederive the Yangian symmetries of the AdS/CFT spin chain using the exceptional superalgebra and find that the epsilon-correction corresponds to the novel symmetry. Also, we reproduce the non-canonical classical r-matrix of the AdS/CFT spin chain expressed with this symmetry from the canonical one of the exceptional algebra.
Keywords
Cite
@article{arxiv.0803.1212,
title = {An Exceptional Algebraic Origin of the AdS/CFT Yangian Symmetry},
author = {Takuya Matsumoto and Sanefumi Moriyama},
journal= {arXiv preprint arXiv:0803.1212},
year = {2014}
}
Comments
20 pages, 3 figures, v3: minor changes and references added