Defect CFT techniques in the 6d N $$ \mathcal{N} $$ = (2, 0) theory

@article{Drukker2020DefectCT,
  title={Defect CFT techniques in the 6d 
 
 
 
 
 N
 
 \$\$ \mathcal\{N\} \$\$
 = (2, 0) theory},
  author={Nadav Drukker and Malte Probst and Maxime Tr'epanier},
  journal={Journal of High Energy Physics},
  year={2020},
  volume={2021},
  pages={1-38}
}
Surface operators are among the most important observables of the 6d N $$ \mathcal{N} $$ = (2 , 0) theory. Here we apply the tools of defect CFT to study local operator insertions into the 1 / 2-BPS plane. We first relate the 2-point function of the displacement operator to the expectation value of the bulk stress tensor and translate this relation into a constraint on the anomaly coefficients associated with the defect. Secondly, we study the defect operator expansion of the stress tensor… 
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