Abstract
We study holographically Lifshitz-scaling theories with broken symmetries. In order to do this, we set up a bulk action with a complex scalar and a massless vector on a background which consists in a Lifshitz metric and a massive vector. We first study separately the complex scalar and the massless vector, finding a similar pattern in the twopoint functions that we can compute analytically. By coupling the probe complex scalar to the background massive vector we can construct probe actions that are more general than the usual Klein-Gordon action. Some of these actions have Galilean boost symmetry. Finally, in the presence of a symmetry breaking scalar profile in the bulk, we reproduce the expected Ward identities of a Lifshitz-scaling theory with a broken global continuous symmetry. In the spontaneous case, the latter imply the presence of a gapless mode, the Goldstone boson, which will have dispersion relations dictated by the Lifshitz scaling.
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ArXiv ePrint: 1709.08383
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Argurio, R., Hartong, J., Marzolla, A. et al. Symmetry breaking in holographic theories with Lifshitz scaling. J. High Energ. Phys. 2018, 53 (2018). https://doi.org/10.1007/JHEP02(2018)053
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DOI: https://doi.org/10.1007/JHEP02(2018)053