Classical Spectral Curve of the AdS_5 x S^5 Lambda Superstring
arXiv:1909.02618 · doi:10.1007/JHEP05(2020)010
Abstract
The classical spectral curve for the worldsheet theory of the AdS_5 x S^5 lambda superstring is constructed. The lambda string is interpreted as a regularized, non-abelian T dual of the AdS_5 x S^5 superstring with respect to full PSU(2,2|4) symmetry. The form of the curve is identified as the semi-classical limit of a set of Bethe ansatz equations for an XXZ type spin chain for the supergroup PSU(2,2|4) in contrast to the string in AdS_5 x S^5 which is XXX type.
45 pages, numerous improvements, version accepted for publication