Atomic Landau-Zener tunneling in Fourier-synthesized optical lattices

Details Atomic Landau-Zener tunneling in Fourier-synthesized optical lattices Atomic Landau-Zener tunneling in Fourier-synthesized optical lattices

2007-07-13

arxiv.org/abs/0707.1980v5

Phys. Rev. Lett. 99, 190405 (2007)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.99.190405

We report on an experimental study of quantum transport of atoms in variable periodic optical potentials. The band structure of both ratchet-type asymmetric and symmetric lattice potentials is explored. The variable atom potential is realized by superimposing a conventional standing wave potential of \lambda/2 spatial periodicity with a fourth-order multiphoton potential of \lambda /4 periodicity. We find that the Landau-Zener tunneling rate between the first and the second excited Bloch band depends critically on the relative phase between the two spatial lattice harmonics.

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