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Phys Rev Lett. 2003 Jul 4;91(1):010407. Epub 2003 Jul 3.

Coherent transport of neutral atoms in spin-dependent optical lattice potentials.

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Ludwig-Maximilians-Universität, Schellingstrasse 4/III, 80799 Munich, Germany.


We demonstrate the controlled coherent transport and splitting of atomic wave packets in spin-dependent optical lattice potentials. Such experiments open intriguing possibilities for quantum state engineering of many body states. After first preparing localized atomic wave functions in an optical lattice through a Mott insulating phase, we place each atom in a superposition of two internal spin states. Then state selective optical potentials are used to split the wave function of a single atom and transport the corresponding wave packets in two opposite directions. Coherence between the wave packets of an atom delocalized over up to seven lattice sites is demonstrated.

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