The paper “Three-parameter deformation of ℝ × S3 in the Landau-Lifshitz limit“, co-authored by Juan Miguel Nieto Garcia and Leander Wyss, has been published in the Journal of High Energy Physics. They construct the effective field theory associated to the ℝ × S3 sector of the three-parameter deformation of AdS3 × S3 × T4 in the Landau-Lifshitz approximation. A link to the published version (available gold open access) is here. The image below shows the action from Section 2 of the paper.
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