Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 50: Quantum Gases (Bosons) V

Q 50.3: Vortrag

Mittwoch, 7. März 2018, 14:30–14:45, K 2.020

Entanglement between two spatially separated atomic modes — •Alexander Idel1, Karsten Lange1, Jan Peise1, Bernd Lücke1, Ilka Kruse1, Guiseppe Vitagliano2,3, Iagoba Apellaniz3, Matthias Kleinmann1, Géza Tóth3,4,5, and Carsten Klempt11Institut für Quantenoptik, Leibniz Universität Hannover — 2Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences — 3Department of Theoretical Physics, University of the Basque Country UPV/EHU — 4IKERBASQUE, Basque Foundation for Science — 5Wigner Research Centre for Physics, Hungarian Academy of Sciences

Large ensembles of ultra-cold atoms offer the possibility to generate an unprecedented level of multi-particle entanglement. However, the creation relies on the fundamental indistinguishability of the particles. Entanglement between spatially addressable systems is required for most applications in the field of quantum information. We employ spin changing collisions in a 87Rb BEC to generate entanglement. By utilizing the natural mode structure of the spin resonances we show entanglement between two spatially separated modes. We prove the entanglement between the modes with a novel criterion, which accounts for imperfections of the state preparation, e.g. varying atom numbers in our condensate and the imperfect symmetry of the state.

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