Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 36: Quantum Gases: Bosons IV
Q 36.1: Vortrag
Mittwoch, 2. März 2016, 14:30–14:45, e001
Generation and Detection of Atomic Spin Entanglement in Optical Lattices — •Han-Ning Dai1,2,3, Bing Yang1,2,3, Andreas Reingruber1,4, Yu-Ao Chen2,3, Zhen-Sheng Yuan2,3,1, and Jian-Wei Pan2,3,1 — 1Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany — 2Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China — 3CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China — 4Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, ErwinSchroedinger-Strasse, Building 46, 67663 Kaiserslautern, Germany
We report on the generation, manipulation and detection of atomic spin entanglement in an optical superlattice. Spin entanglement of the two atoms in the double wells of the superlattice is generated via dynamical evolution governed by spin superexchange. By observing collisional atom loss with in-situ absorption imaging we measure spin correlations of atoms inside the double wells and obtain the lower boundary of entanglement fidelity as 0.79±0.06, and the violation of a Bell’s inequality with S=2.21±0.08. The above results represent an essential step towards scalable quantum computation with ultracold atoms in optical lattices.