The classical spectral curve of the lambda-deformed AdS5 x S5 superstring is constructed and identified with the semiclassical limit of XXZ-type Bethe ansatz equations for PSU(2,2|4).
The classical R-matrix of AdS/CFT and its Lie dialgebra structure
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abstract
The classical integrable structure of Z_4-graded supercoset sigma-models, arising in the AdS/CFT correspondence, is formulated within the R-matrix approach. The central object in this construction is the standard R-matrix of the Z_4-twisted loop algebra. However, in order to correctly describe the Lax matrix within this formalism, the standard inner product on this twisted loop algebra requires a further twist induced by the Zhukovsky map, which also plays a key role in the AdS/CFT correspondence. The non-ultralocality of the sigma-model can be understood as stemming from this latter twist since it leads to a non skew-symmetric R-matrix.
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Classical Spectral Curve of the AdS_5 x S^5 Lambda Superstring
The classical spectral curve of the lambda-deformed AdS5 x S5 superstring is constructed and identified with the semiclassical limit of XXZ-type Bethe ansatz equations for PSU(2,2|4).