# Heidelberg 2015 – wissenschaftliches Programm

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# A: Fachverband Atomphysik

## A 21: Ultra-cold plasmas and Rydberg systems II (with Q)

### A 21.6: Vortrag

### Mittwoch, 25. März 2015, 12:15–12:30, C/kHS

**Modelling spin systems using arrays of single Rydberg atoms** — •Henning Labuhn, Sylvain Ravets, Daniel Barredo, Thierry Lahaye, and Antoine Browaeys — Laboratoire Charles Fabry, UMR 8501, Institut d’Optique, CNRS, Univ Paris Sud 11, 2 avenue Augustin Fresnel, 91127 Palaiseau cedex, France

I will present the latest results of our experiment, where we trap single atoms in variable 2D arrays of optical tweezers [1]. By optically coupling the atoms to Rydberg states, i.e. electronic states with a high principle quantum number *n*, we can engineer strong interactions between the trapped atoms. We then use a microwave field to drive transitions in the Rydberg manifold. Applying such a transition locally on one atom allows us to investigate the coherent propagation of this excitation, which can be fully described by a XY spin Hamiltonian, in the atomic array [2]. The results suggest that arrays of Rydberg atoms are ideally suited to large scale, high-fidelity quantum simulation of spin dynamics.

[1] F. Nogrette, H. Labuhn, S. Ravets, D. Barredo, L. Béguin, A. Vernier, T. Lahaye and A. Browaeys, "Single-Atom Trapping in Holographic 2D Arrays of Microtraps with Arbitrary Geometries", Phys. Rev. **X** 4, 021034 (2014)

[2] D. Barredo, H. Labuhn, S. Ravets, T. Lahaye, A. Browaeys, C. S. Adams, "Coherent Excitation Transfer in a "Spin Chain" of Three Rydberg Atoms", arXiv:1408.1055