Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 32: Rydberg gasses I
A 32.8: Vortrag
Freitag, 10. März 2017, 12:45–13:00, HS 20
Coherent many-body dynamics in Rydberg-dressed spin chains — •Simon Hollerith1, Johannes Zeiher1, Antonio Rubio-Abadal1, Jae-yooni Choi1, Rick van Bijnen3, Immanuel Bloch1,2, and Christian Groß1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany — 2Fakultät für Physik, Ludwig-Maximilians-Universität München, Schellingstraße 4, 80799 München, — 3Institut für Quantenoptik und Quanteninformation, Technikerstr. 21a, 6020 Innsbruck, Austria
Off-resonant optical coupling of a ground state atom to a Rydberg state, so called ``Rydberg-dressing", has been proposed as a versatile method to implement various long-range interacting spin models with ultracold atoms. In our experiment, we realize Rydberg-dressing to implement an Ising spin system, starting with an atomic Mott insulator of Rubidium-87 in an optical lattice with a single atom per site. Using a single photon uv-transition, we couple off-resonantly to a Rydberg p-state. First interferometric experiments in a two-dimensional sample showed the versatility of Rydberg dressing for control of the interactions, however collective loss processes reduced the lifetime of the system. Here, we present results of Rydberg-dressing in a 1d spin chain with long-range Ising interactions. Contrary to the 2d case, the collective loss can be avoided and lifetimes get close to the values expected in an ideal two-level system. We substantiate the improved lifetimes by showing coherent collapse and revival dynamics in the 1d chain. Our results pave the way to study novel symmetry protected topological phases in periodically driven 1d spin chains.