Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 27: Quantum Gases (Bosons) III

Q 27.4: Vortrag

Montag, 5. März 2018, 17:00–17:15, K 2.020

Bottom-up approach to many-body physics with ultracold atoms in adjustable lattices — •Martin Sturm, Malte Schlosser, Gerhard Birkl, and Reinhold Walser — Institute for applied physics, TU Darmstadt, Darmstadt, Germany

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 [1]. 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 based on measurements and simulations of the light field. In addition, we investigate loading procedures starting from Bose-Einstein condensates as well as from low-entropy states in the deep Mott-insulator regime [2]. As a possible application, we analyze two coupled ring lattices that exhibit many-body resonances in their tunneling dynamics.

M. R. Sturm et al., Phys. Rev. A 95 063625 (2017)
M. R. Sturm et al., to be published.