Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 28: Poster: Ultra-cold plasmas and Rydberg systems (with Q)

A 28.7: Poster

Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais

Interacting Spin-1 chains from multi-level Rydberg atoms — •Rick van Bijnen¹, Rejish Nath^1,2,3, Volckmar Nebendahl³, Igor Lesanovsky⁴, Andreas Laeuchli³, and Thomas Pohl¹ — ¹Max Planck Institute for the Physics of Complex Systems, D-01187 Dresden, Germany — ²Indian Institute of Science Education and Research, Pune-411021, India — ³Institut für Theoretische Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria — ⁴School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom

Ultracold, highly excited Rydberg atoms exhibit extremely strong and tunable interactions, making them promising candidates for quantum information and quantum simulation purposes. In particular, Rydberg atoms can provide a very close experimental realisation of interacting spin-1/2 systems, represented by the atomic ground- and Rydberg states. So far, most studies involve a single Rydberg S-state, featuring isotropic van der Waals interactions. Here, we consider laser excitation of two distinct Rydberg S-states, representing an interacting spin-1 system. We discuss additional interactions appearing in this system for varying principal quantum numbers and investigate the resulting phase diagram which reveals a range of interesting non-classical ground states, even in the absence of laser driving.