Migdal-Eliashberg and SUS- Y squared-SYK
The paper investigates strong fermion-boson coupling using Migdal-Eliashberg approximations within various Yukawa-Sachdev-Ye-Kitaev models, including supersymmetric variants. It contrasts these approaches with nonFermi liquid behaviors and explores holographic interpretations of fermion pairing, focusing on how randomness and approximation methods reveal the competition between nonFermi liquid states and superconductivity.