Unitary representations of the algebra of the general covariance group

1977 ◽  
Vol 33 (3) ◽  
pp. 1116-1118
Author(s):  
A. B. Borisov
Keyword(s):  
Unitary Representations ◽  
General Covariance ◽  
Covariance Group

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

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Nadav Drukker ◽  
Malte Probst ◽  
Maxime Trépanier
Keyword(s):  
Stress Tensor ◽  
Unitary Representations ◽  
Point Function ◽  
Displacement Operator ◽  
Expectation Value ◽  
Operator Expansion ◽  
Bulk Stress ◽  
Defect Operator ◽  
Tensor Multiplet

Abstract Surface operators are among the most important observables of the 6d $$ \mathcal{N} $$ 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 multiplet and identify several new operators of the defect CFT. Technical results derived along the way include the explicit supersymmetry tranformations of the stress tensor multiplet and the classification of unitary representations of the superconformal algebra preserved by the defect.

Learning Unsupervised and Supervised Representations via General Covariance

2020 ◽  
pp. 1-1
Author(s):  
Yun-Hao Yuan ◽  
Jin Li ◽  
Yun Li ◽  
Jianping Gou ◽  
Jipeng Qiang
Keyword(s):  
General Covariance
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