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Universal relations for holographic interfaces

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arxiv 2107.02165 v4 pith:SLP5LLZM submitted 2021-07-05 hep-th cond-mat.str-elgr-qc

Universal relations for holographic interfaces

Andreas Karch , Zhu-Xi Luo , Hao-Yu Sun This is my paper
classification hep-th cond-mat.str-elgr-qc
keywords interfacesconformalentanglementfieldholographicrelationstheoriesuniversal
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the entanglement entropy in 1+1 dimensional conformal field theories in the presence of interfaces from a holographic perspective. Compared with the well-known case of boundary conformal field theories, interfaces allow for several interesting new observables. Depending on how the interface is located within the entangling region, the entanglement entropies differ and exhibit surprising new patterns and universal relations. While our analysis is performed within the framework of holography, we expect our results to hold more generally.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. On decoding the string from interfaces in 2d conformal field theories

    hep-th 2025-11 conditional novelty 6.0

    Stringy vibrations of an AdS3 junction between two thermal CFTs map to half-sided conformal transformations, producing perfectly reflected wavepackets, and are readable from interval entanglement entropy even at zero tension.

  2. Entanglement C-functions of defects and interfaces in $\mathcal{N}=4$ supersymmetric Yang-Mills theory

    hep-th 2025-09 conditional novelty 6.0

    A probe-D5 holographic calculation gives analytic defect/interface entanglement entropy for massive D3/D5 intersections and shows the entropic C-function is monotonic but not always a finite degree-of-freedom count.

  3. Connecting boundary entropy and effective central charge at holographic interfaces

    hep-th 2025-07 unverdicted novelty 6.0

    Holographic models of interface CFTs connect the effective central charge in entanglement entropy to a limiting case of boundary entropy, while adding finite terms for non-crossing intervals to satisfy strong subadditivity.