The Fermion-ladder Models: Extensions of the Hubbard Model with $\eta$-pairing

Abstract

We propose the two-leg fermion-ladder models for SU(2|2) and SU(4) cases. The former is exactly the extended Hubbard model proposed by Essler, Korepin and Schoutens. The later is a new model also with $\eta$-pairing symmetry which is important for superconductivity. This new extension of the Hubbard model can be solved exactly.

Latex file, 5 pages

References in corpus (3)

• Triplet superconductivity in quasi one-dimensional systems
• The fate of spinons in spontaneously dimerised spin-1/2 ladders
• Exactly solvable quantum spin tubes and ladders

Cited by in corpus (9)

• Eta-Pairing in Hubbard Models: From Spectrum Generating Algebras to Quantum Many-Body Scars
• Multifaceted moiré superlattice physics in twisted WSe${}_2$ bilayers
• Exactly solvable quantum spin ladders associated with the orthogonal and symplectic Lie algebras
• Entanglement of eta-pairing state with off-diagonal long-range order
• Phase diagram of the su(8) quantum spin tube
• Phase separation of superconducting phases in the Penson-Kolb-Hubbard model
• Exactly solvable su(N) mixed spin ladders
• Magnetization Plateaux in Bethe Ansatz Solvable Spin-S Ladders
• Bethe ansatz for the SU(4) extension of the Hubbard Model