Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster: Quantum Optics and Photonics II

Q 40.7: Poster

Mittwoch, 8. März 2017, 17:00–19:00, P OG2

Bottom-up approach to many-body physics with ultracold atoms in adjustable lattices — •Martin Sturm, Malte Schlosser, Gerhard Birkl, and Reinhold Walser — Institut für Angewandte Physik, Technische Universität Darmstadt

Ultracold atoms in optical lattices have proven to be a powerful toolbox for quantum simulation of many-body physics. With the demonstration of single-site resolved imaging, local properties have shifted into the focus of this field. This development is complemented by the construction of double-well systems from single atoms in optical tweezers.

We present an experimental avenue to scalable and adjustable arrays of optical dipole traps using microlens arrays and spatial light modulators. This setup closes the gap between the aforementioned approaches and allows for a bottom-up construction of many-body systems adding one atom at a time. In order to evaluate the experimental feasibility of this approach we compute the accessible parameter regime for ⁷Li, ²³Na, ⁴¹K, and ⁸⁷Rb from measurements and simulations of the light field. Further, we investigate the time scales and heating mechanisms for loading from a Bose-Einstein condensate as well as from a low entropy state in the deep Mott insulator regime. As a possible application we analyze the tunneling dynamics between two coupled ring lattices. This configuration exhibits additional many-body resonances as compared to bosonic Josephson junctions in double-well potentials.