Topologically twisted renormalization group flow and its holographic dual
Yu Nakayama · Physical review. D/Physical review. D. · 2017
Euclidean field theories admit more general deformations than usually discussed in quantum field theories because of mixing between rotational symmetry and internal symmetry (also known as topological twist). Such deformations may be relevant, and if the subsequent renormalization group flow leads to a nontrivial fixed point, it generically gives rise to a scale invariant Euclidean field theory without conformal invariance. Motivated by an ansatz studied in cosmological models some time ago, we develop a holographic dual description of such renormalization group flows in the context of $\mathrm{AdS}/\mathrm{CFT}$. We argue that the nontrivial fixed points require fine-tuning of the bulk theory, in general, but remarkably we find that the $O(3)$ Yang-Mills theory coupled with the four-dimensional Einstein gravity in the minimal manner supports such a background with the Euclidean anti--de Sitter metric.