Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.22: Poster

Tuesday, March 7, 2017, 17:00–19:00, P OG1+2

Imaging topologically protected transport in 2D optical lattices — •Falk-Richard Winkelmann, Stefan Brakhane, Alexander Knieps, Geol Moon, Gautam Ramola, Carsten Robens, Max Werninghaus, Wolfgang Alt, Dieter Meschede, and Andrea Alberti — Institut für Angewandte Physik - Uni Bonn

Discrete time quantum walks (DTQWs) of neutral atoms in 2D optical lattices provide a versatile platform to simulate topological phenomena arising in condensed matter and artificial gauge fields.

With our recently completed 2D quantum simulator we investigate topologically protected transport, using DTQWs in two dimensions [1].

We make use of polarization-synthesized lattice beams todeterministically transport neutral Cs atoms depending on their internal state. A high numerical aperture (NA = 0.92) objective lens enables us to image and address atoms with single site resolution [2].

We present how we plan to utilize aspatial light modulator to realize a spatially resolved coin operation, which will enable us to prepare topologically protected edge states between regions with different topological phases.

[1] Groh, et al. Robustness of topologically protected edge states in quantum walk experiments with neutral atoms. Phys. Rev. A, 94, Jul 2016. [2] Robens, et al. A high numerical aperture (na = 0.92) objective lens for imaging and addressing of cold atoms. arXiv:1611.02159, 2016.