Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

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

A 28.9: Poster

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

Dissipative Binding of Lattice Bosons through Distance-Selective Pair Loss — •Benjamin Everest, Michael R. Hush, and Igor Lesanovsky — University of Nottingham, Nottingham, UK

The generation of correlated many body states in cold atomic gases is currently of great interest. In this setting, atoms excited to Rydberg states have proven to be a useful tool as they display strong coherent long-range interactions which can also be used to generate non-local dissipation [1]. Here we explore how such an unusual dissipation mechanism fosters the formation of coherent long lived states for bosons trapped in an optical lattice. This system is modelled with a dissipative master equation with Lindblad jump operators of a form such that two atoms separated by a specific critical distance will be removed. When this dissipation competes with coherent hopping, this can lead to bound complexes of atoms whose internal dynamics is linked directly to their motion. Previously this was shown for hard core bosons and we have now extended this model to bosons with finite interaction strength. This system features a manifold of bound complexes and a more intricate dynamical behaviour.
[1] C. Ates, B. Olmos, W. Li and I. Lesanovsky. Dissipative Binding of Lattice Bosons through Distance-Selective Pair Loss. Physical Review Letters, 109(23):233003, December 2012