Identify the E6 simple lines as Wilson loops
Identify the multinomial ultraviolet line operators appearing in the $E_6$ trace-formula theories as explicit supersymmetric Wilson loops, or otherwise determine their precise ultraviolet realization, so that the corresponding infrared simple-line interpretation is established.
References
Note that each $\L$ contains a multinomial for which we could not identify the simple line as a Wilson loop; see appendix \ref{app: A-model} for computations relevant to this.
— The Gaiotto-Kim Trace Formula and Line Defects
(2609.24582 - Kim et al., 21 Sep 2026) in Section 3, subsection “E6 theory,” paragraph “TFT[E6^(1,±)]”