Double brane holographic model dual to 2d ICFTs

Abstract

Abstract A minimal single brane holographic model can be used as a dual to 2d conformal interfaces (ICFTs) to calculate the transmission coefficient T $$ \mathcal{T} $$ of energy transported across the defect as well as boundary entropy log g, the additional entanglement entropy for some sub-region that encloses the defect. Both T $$ \mathcal{T} $$ and log g are uniquely determined by the tension characterizing the brane. In contrast, in field theory defects typically the transmission coefficient can be dialed from 0 to 1 independently for each allowed value of log g. To address this discrepancy, we look at a double brane (3-region bulk) holographic model. Merger of two single brane interfaces creates genuinely new interfaces which indeed allow a range of accessible transmission coefficients for a fixed value of log g. In particular, the T $$ \mathcal{T} $$ = 0 limit of two completely decoupled BCFTs can be achieved.

Keywords

• AdS-CFT Correspondence
• Boundary Quantum Field Theory
• Classical Theories of Gravity
• Field Theories in Lower Dimensions