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

Adebanjo, Ganiyu D.; Kornilovitch, P. E. and Hague, J. P. (2021). Fermion pairing in body-centered-cubic quantum simulators of extended Hubbard models. Physics Letters A, 418, article no. 127704.

DOI: https://doi.org/10.1016/j.physleta.2021.127704

Abstract

We investigate formation and condensation of fermion pairs in cold-atom quantum simulators for extended Hubbard models (UV 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.

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