Phase Structure of Beta-deformed N=4 SYM on S^3 with Chemical Potentials

Abstract

We study the beta-deformation of N=4 SYM on S^3 with chemical potentials for the U(1)_R as well as the two global U(1) symmetries. The one-loop effective potential at weak coupling is computed for both the Coulomb and Higgs branches. At near critical chemical potential and small finite temperature, we find a metastable state at the origin of moduli space. On the Higgs branch, this has the interpretation in terms of deconstruction as an extra-dimensional torus which becomes metastable for infinite size and decays to zero size through quantum tunnelling and thermal activation. At strong coupling, the theory is described by its gravitational dual. The relevant background is found by performing a TsT-transformation on the solution describing an AdS_5 black hole spinning in S^5. A probe-brane calculation, using giant gravitons as probes, reveals qualitative agreement with the weak coupling results.

42 pages, 1 figure

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• Aspects of Gauge-Gravity Duality