Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 51: Poster: Quantum Optics and Photonics IV
Q 51.4: Poster
Wednesday, March 7, 2018, 16:15–18:15, Redoutensaal
Non-equilibrium dynamics of interacting Bosons in an optical lattice — •Johannes Bauer1, René Hamburger1, Jens Benary1, Christian Baals1,2, Jian Jiang1, Andreas Müllers1, and Herwig Ott1 — 1Department of Physics and Research Center OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, 55128 Mainz, Germany
We study the non-equilibrium dynamics of ultracold Bose gases in optical lattices using a scanning electron microscope. In a first experiment we characterize the emerging steady-states of a driven-dissipative Josephson junction array, realized with a BEC in a one-dimensional optical lattice. By locally applying dissipation using the electron beam at an initially full site, we can induce a superfluid response which keeps the respective site filled. This can be seen as an extension of the paradigm of Coherent Perfect Absorption (CPA). CPA refers to the complete extinction of incoming radiation by spatially localized absorber embedded in a wave-guiding medium. Furthermore, we make use of the Talbot effect to study phase coherence in an optical lattice at a finite range. The interferometer which relies on the fast blanking of the lattice potential is applied to study the spread of phase coherence after a quench of the lattice depth. Our current work is focused on the generation and stabilization of dark solitons in 3D. To imprint the phase step of π onto a BEC we use a Digital Micromirror Device to create a sharp edge in the beam profile of a 532nm laser. We will then make use of the electron beam as a source of local dissipation to stabilise the dark soliton.