Abstract
We consider a family of deformations of T 1,1 in the Yang-Baxter sigma model approach. We first discuss a supercoset description of T 1,1, which makes manifest the full symmetry of the space and leads to the standard Sasaki-Einstein metric. Next, we consider three-parameter deformations of T 1,1 by using classical r-matrices satisfying the classical Yang-Baxter equation (CYBE). The resulting metric and NS-NS two-form agree exactly with the ones obtained via TsT transformations, and contain the Lunin-Maldacena background as a special case. It is worth noting that for AdS5 × T 1,1 , classical integrability for the full sector has been argued to be lost. Hence our result indicates that the Yang-Baxter sigma model approach is applicable even for non-integrable cosets. This observation suggests that the gravity/CYBE correspondence can be extended beyond integrable cases.
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Crichigno, P.M., Matsumoto, T. & Yoshida, K. Deformations of T 1,1 as Yang-Baxter sigma models. J. High Energ. Phys. 2014, 85 (2014). https://doi.org/10.1007/JHEP12(2014)085
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DOI: https://doi.org/10.1007/JHEP12(2014)085