2010/05/31 by Marco Chiodaroli, Michael Gutperle, Ling-Yan Hung · 1 citation
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Boundary (topology) #Cosmology and Gravitation Theories #Dilaton #Entropy (arrow of time) #Geometry #Holography #Janus #Mathematical analysis #Mathematical physics #Mathematics #Noncommutative and Quantum Gravity Theories #Orbifold #Physics #Quantum mechanics #Supergravity #Supersymmetry #Theoretical physics #Twist #hep-th
paper · pdf · doi:10.1007/jhep09(2010)082
published as JHEP 1009:082,2010 · 35 pages, pdf-LaTeX, 5 figures, v2: minor changes, typos corrected, reference added
arxiv created 2010/06/19 · openalex publication_date 2010/09/01 · arxiv updated 2014/11/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
In this paper we compute the holographic boundary entropy for half-BPS Janus deformations of the AdS 3 × S 3 × T 4 vacuum of type IIB supergravity. Previous work [24] has shown that there are two independent deformations of this sort. In one case, the six-dimensional dilaton jumps across the interface, while the other case displays a jump of axion and four-form potential. In case of a jump of the six-dimensional dilaton, it is possible to compare the holographic result with the weak-coupling result for a two-dimensional interface CFT where the radii of the compactified bosons jump across the interface. We find exact agreement between holographic and CFT results. This is to be contrasted with the holographic calculation for the non-supersymmetric Janus solution, which agrees with the CFT result only at the leading order in the jump parameter. We also examine the implications of the holographic calculation in case of a solution with a jump in the axion, which can be associated with a deformation of the CFT by the Z 2-orbifold twist operator.