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The boundary entropy function for interface conformal field theories

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arxiv 2412.05381 v4 pith:VXA7EVXH submitted 2024-12-06 hep-th cond-mat.str-el

The boundary entropy function for interface conformal field theories

Evangelos Afxonidis , Andreas Karch , Chitraang Murdia This is my paper
classification hep-th cond-mat.str-el
keywords boundaryfunctioninterfaceconformaldetermineddimensionalentropyfield
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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{In 1+1 dimensional conformal field theory with a boundary the boundary contribution to the entanglement entropy is determined by a single number $g$ effectively counting the boundary degrees of freedom. In contrast, in 1+1 dimensional interface CFTs the corresponding quantity is a non-trivial {\it function} depending on the position of the interval relative to the interface, giving access to much more detailed information about the defect. In this work we determined this $g$-function in several examples using holography and derive some of its basic properties from holography and strong subadditivity.

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Cited by 4 Pith papers

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

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  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.

  4. The degrees of freedom of multiway junctions in three dimensional gravity

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