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Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 48: Quantum Gases (Fermions) III

Q 48.1: Talk

Wednesday, March 7, 2018, 14:00–14:15, K 1.022

Dynamics in the dissipative Fermi-Hubbard model — •Koen Sponselee1, Benjamin Abeln1, Marcel Diem1, Maximilian Hagenah1, Bodhaditya Santra1, Klaus Sengstock1,2, and Christoph Becker1,21Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 2Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

Excellent isolation from environmental influences is a key requirement of many quantum physics experiments, because dissipation usually leads to decoherence in the quantum world. Counter-intuitively, certain types of dissipation can also drive a quantum system into a highly entangled steady state and are thus useful for quantum state preparation.

Here we report on the realization of the one-dimensional dissipative Fermi Hubbbard model exploiting strong two-body loss processes occurring in excited state collisions of 173Yb atoms. Starting from a Mott-insulating state we induce non-equilibrium dynamics leading to strong initial particle loss. Strikingly, after a transient time, this loss is largely suppressed, which we attribute to the build-up of correlations. Our measurements indicate the formation of highly entangled fermionic many-body states, which could be useful for metrology or quantum simulation.

This work is supported by the DFG within the SFB 925.

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