Abstract
Abstract
We consider a cusped Wilson line with J insertions of scalar fields in $$ \mathcal{N} $$
N
= 4 SYM and prove that in a certain limit the Feynman graphs are integrable to all loop orders. We identify the integrable system as a quantum fishchain with open boundary conditions. The existence of the boundary degrees of freedom results in the boundary reflection operator acting non-trivially on the physical space. We derive the Baxter equation for Q-functions and provide the quantisation condition for the spectrum. This allows us to find the non-perturbative spectrum numerically.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
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