Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 34: Poster: Ultra-cold atoms, ions and BEC (with Q)
A 34.20: Poster
Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais
Crystallization in dissipative Rydberg lattices — •Wildan Abdussalam1, Michael Hoenig2, George Bannasch1, Michael Fleischhauer2, and Thomas Pohl1 — 1Max Planck Institute for the Physics of Complex Systems, D-01187 Dresden, Germany — 2Fachbereich Physik und Forschungszentrum OPTIMAS, Technische Universiteit Kaiserslautern, 67663 Kaiserslautern, Germany
We study two-dimensional lattices of Rydberg atoms with strong van der Waals interactions for configurations in which the competition between coherent laser driving and dissipative processes lead to an inversion of electronic populations. Using Monte Carlo simulations we determine the many-body steady states of this system and identify conditions for the emergence of crystalline phases. Despite the rapid drop of the van der Waals potential the long-range tail of the interaction is shown to qualitatively affect the system behaviour, making simplified nearest-neighbor models inapplicable. Comparisons to previous mean field predictions moreover highlight the importance of classical correlations. Finally, we will discuss different experimental routes to observe the predicted phase transition towards crystalline order.