For the 1D SU(N) Fermi-Hubbard chain at filling 1/N, the author finds finite critical interactions Uc approximately 1.9, 2.2, 2.8 for N=3, 4, 6, and central charges consistent with N-1 (Mott) and N (metallic) critical modes.
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Density Matrix Renormalization Group simulations of the SU(N) Fermi-Hubbard chain implementing the full SU(N) symmetry via Semi-Standard Young Tableaux and Unitary Group Subduction Coefficients
For the 1D SU(N) Fermi-Hubbard chain at filling 1/N, the author finds finite critical interactions Uc approximately 1.9, 2.2, 2.8 for N=3, 4, 6, and central charges consistent with N-1 (Mott) and N (metallic) critical modes.