Hannover 2016 – scientific programme

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A: Fachverband Atomphysik

A 9: Ultra-cold atoms, ions and BEC (with Q)

A 9.20: Poster

Monday, February 29, 2016, 16:30–19:00, Empore Lichthof

A quantum gas machine for studies of local losses induced by photoionization — •Tobias Kroker¹, Janine Franz¹, Bernhard Ruff^2,3, Tim Anlauf¹, Juliette Simonet¹, Philipp Wessels^1,3, Markus Drescher^2,3, and Klaus Sengstock^1,3 — ¹Zentrum für Optische Quantentechnologien, Hamburg, Germany — ²Institut für Experimentalphysik, Hamburg, Germany — ³The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany

Local photoionization of ultracold atoms shall offer insight into the coherence properties of a Bose-Einstein condensate (BEC). To access the corresponding quantum effects, we are setting up an experiment which allows resolving correlations among electrons photoionized from a BEC by a femtosecond laser pulse.

Here we report on our progress in setting up a quantum gas machine where the ultracold gases are optically transported into the focus region of the femtosecond laser beam. As photoionization induces local losses in the BEC, a theoretical model of the dissipative system is essential including a quantification of the quantum Zeno effect.