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arXiv · 1508.02947

Ab initio transport results for strongly correlated fermions

N. Schlünzen·S. Hermanns·M. Bonitz·C. Verdozzi
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Abstract

Quantum transport of strongly correlated fermions is of central interest in condensed matter physics. Here, we present first-principle nonequilibrium Green functions results using $T$-matrix selfenergies for finite Hubbard clusters of dimension $1,2,3$. We compute the expansion dynamics following a potential quench and predict its dependence on the interaction strength and particle number. We discover a universal scaling, allowing an extrapolation to infinite-size systems, which shows excellent agreement with recent cold atom diffusion experiments [Schneider et al., Nat. Phys. 8, 213 (2012)].

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N. Schlünzen, S. Hermanns, M. Bonitz, C. Verdozzi. 2015-08-12. Ab initio transport results for strongly correlated fermions. https://doi.org/10.1103/physrevb.93.035107

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