Atomic Bloch-Zener Oscillations and Stückelberg Interferometry in Optical Lattices

Details Atomic Bloch-Zener Oscillations and Stückelberg Interferometry in Optical Lattices Atomic Bloch-Zener Oscillations and Stückelberg Interferometry in Optical Lattices

2010-06-11

arxiv.org/abs/1006.2358v1

Phys. Rev. Lett. 105, 215301 (2010)

Physics

Condensed Matter

Quantum Gases

Scientific paper

We report on experiments investigating quantum transport and band interferometry of an atomic Bose-Einstein condensate in an optical lattice with a two-band miniband structure, realized with a Fourier-synthesized optical lattice potential. Bloch-Zener oscillations, the coherent superposition of Bloch oscillations and Landau-Zener tunneling between the two bands are observed. When the relative phase between paths in different bands is varied, an interference signal is observed, demonstrating the coherence of the dynamics in the miniband system. Measured fringe patterns of this St\"uckelberg interferometer allow to interferometrically map out the band structure of the optical lattice over the full Brillouin zone.

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