Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 34: Poster: Ultra-cold atoms, ions and BEC (with Q)

A 34.23: Poster

Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais

Artificial gauge fields in a driven optical lattice — •Malte Weinberg¹, Christoph Ölschläger¹, Julian Struck¹, Juliette Simonet¹, Patrick Windpassinger², and Klaus Sengstock¹ — ¹Institut für Laserphysik, Universität Hamburg, Germany — ²Institut für Physik, Johannes Gutenberg-Universität, Mainz, Germany

Atomic quantum gases are neutral, and therefore, not affected by external electromagnetic fields in the way electrons are. This constitutes a central issue towards the quantum simulation of solid state models involving an external magnetic field, e.g. the Quantum Spin Hall Effect. Therefore the experimental realization of artificial gauge fields in ultracold atomic systems shall put through quantum simulators of new kinds of exotic quantum matter.

In this perspective, driven optical lattices constitute a versatile tool, which allows controlling both phase and amplitude of the complex tunneling parameters and, thus, generating artificial gauge potentials [1]. By expanding this concept to a triangular lattice structure, it is possible to realize gauge invariant and fully tunable artificial magnetic fluxes that exhibit a staggered ordering [2].

[1] J. Struck et al., Phys. Rev. Lett. 108, 225304 (2012)

[2] J. Struck et al., Nat. Phys. 9, 738-743 (2013)