Correlated spin-flip tunneling in a Fermi lattice gas. Xu, W., Morong, W., Hui, H., Scarola, V., W., & DeMarco, B. Physical Review A, 98(2):023623, American Physical Society, 8, 2018. Paper Website doi abstract bibtex We report the realization of correlated, density-dependent tunneling for fermionic 40K atoms trapped in an optical lattice. By appropriately tuning the frequency difference between a pair of Raman beams applied to a spin-polarized gas, simultaneous spin transitions and tunneling events are induced that depend on the relative occupations of neighboring lattice sites. Correlated spin-flip tunneling is spectroscopically resolved using gases prepared in opposite spin states, and the inferred Hubbard interaction energy is compared with a tight-binding prediction. We show that the laser-induced correlated tunneling process generates doublons via loss induced by light-assisted collisions. Furthermore, by controllably introducing vacancies to a spin-polarized gas, we demonstrate that correlated tunneling is suppressed when neighboring lattice sites are unoccupied.
@article{
title = {Correlated spin-flip tunneling in a Fermi lattice gas},
type = {article},
year = {2018},
pages = {023623},
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abstract = {We report the realization of correlated, density-dependent tunneling for fermionic 40K atoms trapped in an optical lattice. By appropriately tuning the frequency difference between a pair of Raman beams applied to a spin-polarized gas, simultaneous spin transitions and tunneling events are induced that depend on the relative occupations of neighboring lattice sites. Correlated spin-flip tunneling is spectroscopically resolved using gases prepared in opposite spin states, and the inferred Hubbard interaction energy is compared with a tight-binding prediction. We show that the laser-induced correlated tunneling process generates doublons via loss induced by light-assisted collisions. Furthermore, by controllably introducing vacancies to a spin-polarized gas, we demonstrate that correlated tunneling is suppressed when neighboring lattice sites are unoccupied.},
bibtype = {article},
author = {Xu, Wenchao and Morong, William and Hui, Hoi-Yin and Scarola, Vito W. and DeMarco, Brian},
doi = {10.1103/PhysRevA.98.023623},
journal = {Physical Review A},
number = {2}
}
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