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Q: Fachverband Quantenoptik und Photonik

Q 53: Poster: Quantum Optics and Photonics III

Q 53.23: Poster

Donnerstag, 9. März 2017, 17:00–19:00, P OG2

Simulation of many-body spin dynamics using Rydberg atoms — •Renato Ferracini Alves, Miguel Ferreira-Cao, Vladislav Gavryusev, Sebastian Geier, Andre Salzinger, Gerhard Zürn, Adrien Signoles, Shannon Whitlock, and Matthias Weidemüller — Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany

Due to its long range interactions, ultracold Rydberg gases are a suitable platform for analog quantum simulation of many-body spin dynamics. This allows us to investigate, in a controlled environment, physical phenomena related to practical but less tunable systems, such as quantum magnetism in condensed matter materials. In our experiment we realize these spin models, by mapping two strongly interacting Rydberg states to two spin 1/2 states (| n,l ⟩→ | ↓ ⟩ and | n′,l′ ⟩→ | ↑ ⟩). We will present preliminary results of the characterization of this microwave-driven spin dynamics, through global variables, using a phase-controlled driving field. We measured a density-dependent damping of the magnetization, that we attribute to interactions, and observe that its dynamics cannot be fully explained by mean field approximations. Techniques such as Ramsey interrogation, spin locking and quantum state tomography, enabled by the phase control of the driving field, are used to characterize this magnetization dynamics in more detail.