Experimental realization of a density-dependent Peierls phase in a synthetic, spin-orbit coupled minimal system of three Rydberg atoms
April 7th, 2020 VINCENT LIENHARD Institut d’Optique, France

Synthetic quantum systems, i.e., well-controlled ensembles of interacting particles, are appealing to study many-body phenomena inspired by condensed matter physics. One of the current challenges using this approach is to investigate the interplay between the non-trivial topology of a band structure, resulting from, e.g., an effective magnetic field, and the interactions between particles.

In this presentation, I will show how such an effective magnetic field can be engineered using the intrinsic spin-orbit coupling of the dipole-dipole interaction between Rydberg atoms. Our experimental demonstration of the realization of this magnetic field relies on the observation of the characteristic chiral motion of the Rydberg excitation between three sites. Remarkably, the engineered magnetic field depends on the number of Rydberg excitations on the three sites, in such a way that we realize a density-dependent Peierls phase and probe the effect of interactions in our system.

I will then show how, extending the same approach to a larger number of sites, we may observe in the future chiral edge states on honeycomb lattices, revealing topological properties on small Rydberg clusters.

Instructions for joining Seminar: All interested may join this seminar. Participants will be asked to register upon entry. Enter with video and microphone in “off”.

Link to Seminar:

Tuesday, April 7, 2020, 12:00. ONLINE

Hosted by Prof. Leticia Tarruell