Slave-boson Formalism for Superconducting Pairing at Strong Coupling
Abstract
We study the emergence of superconductivity in the one-band Hubbard model using the spin-rotation-invariant Kotliar-Ruckenstein slave-boson (SB) approach. Motivated by its intrinsically renormalized mean-field ground state, we construct an effective pairing vertex from dynamical fluctuations about the saddle point. Solving the anisotropic, frequency-dependent gap equation on the square lattice, we map the pairing instabilities across doping, interaction, temperature and real-frequency gap structure that qualitatively match experimental cuprate observations. This framework merges strong-correlation SB-type renormalizations with RPA-type pairing transparency, providing a scalable route to modeling multi-orbital superconductivity at strong coupling.
Cite
@article{arxiv.2605.26233,
title = {Slave-boson Formalism for Superconducting Pairing at Strong Coupling},
author = {Sarbajit Mazumdar and Jonas Issing and Jannis Seufert and David Riegler and Peter Wölfle and Ronny Thomale and Michael Klett},
journal= {arXiv preprint arXiv:2605.26233},
year = {2026}
}
Comments
25 pages, 11 figures