Stuttgart 2012 – scientific programme

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A: Fachverband Atomphysik

A 2: Atomic systems in external fields I

A 2.6: Talk

Monday, March 12, 2012, 11:45–12:00, V57.05

Observation of local temporal correlations in trapped quantum gases — •Vera Guarrera, Ralf Labouvie, Andreas Vogler, Peter Wurtz, Giovanni Barontini, and Herwig Ott — Research Center OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany

We measure the temporal pair correlation function of a 3-dimensional trapped gas of bosons above and below the critical temperature for Bose-Einstein condensation. The measurement is performed in situ using a local, time-resolved single-atom sensitive probing technique, based on scanning electron microscopy. Third and fourth order correlation functions are also extracted from the same data. We further extend this diagnostics to samples of few 1-dimensional tubes of ultracold bosons in the quasi-condensate and strongly interacting regimes, obtaining, in the second case, clear antibunching signal as a consequence of interaction induced "fermionization". Our results promote temporal correlations as new observables to study the dynamical evolution of ultracold quantum gases.