Fermi-Hubbard type models

Pairing

We have found a model -- concretely, the mixed dimensional bilayer model -- in which pairing is strongly enhanced, yielding binding energies on the order of the superexchange J [1]. These binding energies are sufficiently high that pairing can be (and has been) observed in a cold atom experiment [2].

[1] "Strong pairing in mixed dimensional bilayer antiferromagnetic Mott insulators" -- Bohrdt et al., Nature Physics 18 (2022)

[2] "Magnetically mediated hole pairing in fermionic ladders of ultracold atoms" -- Hirthe et al., Nature 613 (2023)