Fermion pairing in body-centered-cubic quantum simulators of extended Hubbard models

We investigate formation and condensation of fermion pairs in cold-atom quantum simulators for extended Hubbard models (U V models) with body-centered-cubic (BCC) optical lattices in the dilute limit, predicting small and light pairs. Pair mass, radius, and binding conditions are calculated, and used to compute transition temperatures. We predict that: (a) local pairs form in BCC optical lattices and binding energies can be large; (b) for particular cases where onsite U and intersite V are attractive with similar size, pairs are both small and light; and (c) pairs of 6Li atoms Bose-Einstein condense at temperatures of around 10 nK. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

This study investigates the formation and condensation of fermion pairs in cold-atom quantum simulators, predicting small and light pairs. Pair mass, radius, and binding conditions are calculated, and transition temperatures are computed. The research predicts that local pairs form in BCC optical lattices with large binding energies, and that pairs of 6Li atoms Bose-Einstein condense at temperatures around 10 nK.