Hannover 2016 – wissenschaftliches Programm

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SYPS: PhD Symposium Synthesized Gauge Fields and Experimental Realizations

SYPS 1: Synthesized Gauge Fields and Experimental Realizations

SYPS 1.4: Hauptvortrag

Dienstag, 1. März 2016, 16:00–16:30, e415

Observing edge states with ultracold neutral fermions in synthetic dimensions — •Leonardo Fallani — University of Florence, Italy

I will report on recent experiments performed at LENS with ultracold multicomponent 173Yb Fermi gases. We have engineered Raman transitions between different 173Yb nuclear spin states to synthesize an effective lattice dynamics in a finite-sized “extra dimension”, which is encoded in the internal degree of freedom of the atoms [1]. By using this innovative approach, we have realized synthetic magnetic fields for effectively-charged fermions in ladder geometries with a variable number of legs. Direct imaging of the individual legs allowed us to demonstrate the emergence of chiral edge currents and to observe edge-cyclotron orbits propagating along the edges of the system, thus providing a direct evidence of a fundamental feature of quantum Hall physics in ultracold fermionic systems.

[1] M. Mancini et al., Observation of chiral edge states with neutral fermions in a synthetic Hall ribbon, Science 349, 1510 (2015).