Double Trace Interfaces

Understand

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.