Double brane holographic model dual to 2d ICFTs

Abstract

A minimal single-brane holographic model can be used as a dual to 2d conformal interfaces (ICFTs) to calculate the transmission coefficient $\mathcal{T}$ 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 $\mathcal{T}$ 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 $\mathcal{T}=0$ limit of two completely decoupled BCFTs can be achieved.

23 pages, 6 images; v2: added minor clarifications regarding the allowed tension ranges, and comments on saturating the AANEC bound in those ranges

References in corpus (4)

• Minkowski-space correlators in AdS/CFT correspondence: recipe and applications
• Schwinger-Keldysh Propagators from AdS/CFT Correspondence
• Phases of Holographic Interfaces
• Universal relations for holographic interfaces

Cited by in corpus (2)

• Energy Transport for Thick Holographic Branes
• Transport across interfaces in symmetric orbifolds