’t Hooft loops and integrability
Charlotte Kristjansen, Konstantin Zarembo
Abstract
A bstract We consider the defect CFT defined by a ’t Hooft line embedded in $$ \mathcal{N} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>N</mml:mi> </mml:math> = 4 super Yang-Mills theory. By explicitly quantizing around the given background we exactly reproduce a prediction from S-duality for the correlators between the ’t Hooft line and chiral primaries in the bulk and pave the way for higher loop analyses for non-protected operators. Furthermore, we demonstrate at the leading perturbative order that correlators between the ’t Hooft line and non-protected bulk operators can be efficiently computed using integrability. As a byproduct we find new integrable overlaps in $$ \mathfrak{sl} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>sl</mml:mi> </mml:math> (2) spin chains in different representations.