Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2011-10-05
JHEP 1202:095,2012
Physics
High Energy Physics
High Energy Physics - Theory
25 pages. 12 Figures. Corrected minor typos and clarified certain results
Scientific paper
10.1007/JHEP02(2012)095
Using holography, we study the entanglement entropy of strongly coupled field theories perturbed by operators that trigger an RG flow from a conformal field theory in the ultraviolet (UV) to a new theory in the infrared (IR). The holographic duals of such flows involve a geometry that has the UV and IR regions separated by a transitional structure in the form of a domain wall. We address the question of how the geometric approach to computing the entanglement entropy organizes the field theory data, exposing key features as the change in degrees of freedom across the flow, how the domain wall acts as a UV region for the IR theory, and a new area law controlled by the domain wall. Using a simple but robust model we uncover this organization, and expect much of it to persist in a wide range of holographic RG flow examples. We test our formulae in two known examples of RG flow in 3+1 and 2+1 dimensions that connect non-trivial fixed points.
Albash Tameem
Johnson Clifford V.
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