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On AdS₃/ICFT₂ with a dynamical scalar field located on the brane

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arxiv 2403.20102 v3 pith:WTK2TZDK submitted 2024-03-29 hep-th cond-mat.str-elgr-qc

On AdS₃/ICFT₂ with a dynamical scalar field located on the brane

classification hep-th cond-mat.str-elgr-qc
keywords interfacefieldscalarbranedynamicalentropybulkexamples
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We exploit holographic duality to study the system of a one-dimensional interface contacting two semi-infinite two-dimensional CFTs. Central to our investigation is the introduction of a dynamical scalar field located on the bulk interface brane which breaks the scaling symmetry of the dual interface field theory, along with its consequential backreaction on the system. We define an interface entropy from holographic entanglement entropy. At zero temperature we construct several illustrative examples and observe that the $g$-theorem is always satisfied. These examples also reveal distinct features of the interface entropy that are intricately linked to the scalar potential profiles. At finite temperature we find that the dynamical scalar field enables the bulk theory to have new configurations which would be infeasible solely with a tension term on the interface brane.

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Cited by 2 Pith papers

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

  1. Entanglement in Presence of Topological Interfaces and Dualities

    hep-th 2026-07 conditional novelty 7.0

    Duality interfaces in 2d CFT project the vacuum entanglement spectrum onto a single symmetry sector, making the interface itself a physical symmetry-resolution filter.

  2. Defects extremal surfaces and interface CFTs

    hep-th 2026-07 conditional novelty 4.0

    A generalized defect-extremal-surface prescription for AdS3/ICFT2 is shown to match island-formula entropies in the large-tension limit and to produce Page curves for 2d eternal black holes.