Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 51: Nonequilibrium Quantum Many-Body Systems I (joint session TT/DY)
TT 51.7: Vortrag
Mittwoch, 14. März 2018, 11:30–11:45, H 3010
Multiple particle-hole pair creation in the Fermi-Hubbard model — •Friedemann Queisser, Nicolai ten Brinke, Uwe Bovensiepen, and Ralf Schützhold — Fakultät für Physik, Universität Duisburg-Essen, Lotharstrasse 1, 47057 Duisburg, Germany
We study the Fermi-Hubbard model in the strongly correlated Mott phase under
the influence of a harmonically oscillating hopping rate J(t) = J0 + 4J cos(ω t).
If ω is near an integer multiple of the gap we find higher-order resonances where
multiple particle-hole pairs are created. The creation of these pairs depends
crucially on the specific form of the underlying lattice geometry. We discuss the
microscopic mechanism for multiple pair creation in small lattices.
N. ten Brinke, M. Ligges, U. Bovensiepen and R. Schützhold, Phys. Rev. B 95, 195123 (2017)