Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 31: Quantum gases (Fermions) (joint session A/Q)
A 31.5: Vortrag
Donnerstag, 14. März 2019, 15:00–15:15, S HS 1 Physik
Dynamics in the Dissipative Fermi-Hubbard Model — •Lukas Freystatzky1,2, Koen Sponsele1, Benjamin Abeln1, Marcel Diem1, Bastian Hundt1, André Kochanke1, Thomas Ponath1, Bodhaditya Santra1, Klaus Sengstock1,2,3, Christoph Becker1,3, and Ludwig Mathey1,2,3 — 1Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany — 3Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
We study the decay dynamics of metastable 173Yb atoms in a one dimensional lattice realizing a dissipative Fermi-Hubbard model. The dynamics are governed by the coherent evolution due to the Hamiltonian as well as an inelastic scattering process leading to two particle losses. We model the system with a Master equation approach and observe that the system is quickly driven into highly correlated Dicke states, which do not show dissipation any more. We observe a qualitatively similar result in experiment, and study the dependence of the particle number of the steady state on various parameters, motivated by the experimental findings.
The creation of strongly correlated states is a robust phenomenon and the dissipation can potentially be used to drive the system to very specific states, offering interesting opportunities for precision measurements.