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Q: Fachverband Quantenoptik und Photonik
Q 4: Quantum gases (Fermions) I
Q 4.2: Vortrag
Montag, 9. März 2020, 11:15–11:30, e214
Dark state dynamics in dissipative Fermi gases — •Lukas Freystatzky1,2 and Ludwig Mathey1,2 — 1Zentrum für Optische Quantentechnologien, Universität Hamburg, Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
Inspired by recent experiments in ultracold Ytterbium gases, reported by Sponsele et.al., Quantum Science and Technology 4, 014002 (2019), we investigate the dynamics of the dissipative 1D Fermi-Hubbard model.
The dynamics is governed by the coherent evolution due to the Hamiltonian as well as an inelastic scattering process leading to two particle losses. We model this system with a Master equation formalism, for small system sizes. We expand these studies to larger system sizes by using a quantum Jump algorithm.
In our model we find dark states, i.e. eigenstates of the Hamiltonian that do not couple to the dissipative term. Depending on the initial state the system can be driven into different dark states with distinct properties. For example, a spin balanced initial state decays into highly correlated Dicke states.
Other initial states give rise to dark states with non-trivial dynamics, as we report in this presentation.