Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 59: Quantum Gases (Bosons) VI
Q 59.1: Vortrag
Donnerstag, 8. März 2018, 10:30–10:45, K 2.020
Dynamical signatures of Z2 gauge invariance on a single plaquette — •Christian Schweizer1, Fabian Grusdt2, Moritz Berngruber1, Michael Lohse1, Monika Aidelsburger1, Luca Barbiero3, Nathan Goldmann3, Eugene Demler2, and Immanuel Bloch1 — 1LMU München & MPQ Garching — 2Harvard University, Massachsetts, USA — 3Université libre de Bruxelles, Belgium
Synthetic magnetic and electric fields for ultracold neutral atoms have been implemented in various setups with dynamical control over the systems’ parameters. However, the realized fields are purely classical and there exists no back-action of the particles on these fields. Here, we present a minimal example that exhibits fully coherent quantum dynamics for the artificial gauge field on a four-site plaquette. The dynamical gauge field emerges through the interaction between impurity atoms and particles represented by different spin species. We place one impurity atom on each horizontal link of the plaquette and probe the dynamical field with a third particle that interacts with the impurities and thus generates a back-action.