paper

On the massless modes of the AdS3/CFT2 integrable systems

arXiv:1211.1952

Abstract

We make a proposal for incorporating massless modes into the spin-chain of the AdS3/CFT2 integrable system. We do this by considering the alpha to 0 limit of the alternating d(2,1;alpha)^2 spin-chain constructed in arXiv:1106.2558. In the process we encounter integrable spin-chains with non-irreducible representations at some of their sites. We investigate their properties and construct their R-matrices in terms of Yangians.

83 pages, 13 figures. v2: fixed typos and references. v3: extended appendix C

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