Journal of High Energy Physics

, 2017:110 | Cite as

Double trace interfaces

  • Charles M. Melby-Thompson
  • Cornelius Schmidt-ColinetEmail author
Open Access
Regular Article - Theoretical Physics


We introduce and study renormalization group interfaces between two holographic conformal theories which are related by deformation by a scalar double trace operator. At leading order in the 1/N expansion, we derive expressions for the two point correlation functions of the scalar, as well as the spectrum of operators living on the interface. We also compute the interface contribution to the sphere partition function, which in two dimensions gives the boundary g factor. Checks of our proposal include reproducing the g factor and some defect overlap coefficients of Gaiotto’s RG interfaces at large N , and the two-point correlation function whenever conformal perturbation theory is valid.


AdS-CFT Correspondence Conformal and W Symmetry Renormalization Group 


Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.


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Copyright information

© The Author(s) 2017

Authors and Affiliations

  • Charles M. Melby-Thompson
    • 1
  • Cornelius Schmidt-Colinet
    • 2
    Email author
  1. 1.Department of PhysicsFudan UniversityShanghaiChina
  2. 2.Arnold Sommerfeld CenterLudwig-Maximilians-UniversitätMünchenGermany

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