Nonequilibrium Mass Transport in the 1D Fermi-Hubbard Model.
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Abstract
We experimentally and numerically investigate the sudden expansion of fermions in a homogeneous one-dimensional optical lattice. For initial states with an appreciable amount of doublons, we observe a dynamical phase separation between rapidly expanding singlons and slow doublons remaining in the trap center, realizing the key aspect of fermionic quantum distillation in the strongly interacting limit. For initial states without doublons, we find a reduced interaction dependence of the asymptotic expansion speed compared to bosons, which is explained by the interaction energy produced in the quench.
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0206 Quantum Physics
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Phys Rev Lett
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0031-9007
1079-7114
1079-7114
Volume Title
121
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American Physical Society (APS)