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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 cost). 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)

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