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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 Dai^1,2,3, Bing Yang^1,2,3, Andreas Reingruber^1,4, Yu-Ao Chen^2,3, Zhen-Sheng Yuan^2,3,1, and Jian-Wei Pan^2,3,1 — 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.