Atom Interferometry in a Vertical Optical Lattice

Details Atom Interferometry in a Vertical Optical Lattice Atom Interferometry in a Vertical Optical Lattice

2004-11-09

arxiv.org/abs/physics/0411097v1

Fortschr. Phys. 52, 1173 (2004)

Physics

Atomic Physics

10 pages, 5 figures

Scientific paper

10.1002/prop.200410187

We have studied the interference of degenerate quantum gases in a vertical optical lattice. The coherence of the atoms leads to an interference pattern when the atoms are released from the lattice. This has been shown for a Bose-Einstein condensate in early experiments. Here we demonstrate that also for fermions an interference pattern can be observed provided that the momentum distribution is smaller then the recoil momentum of the lattice. Special attention is given to the role of interactions which wash out the interference pattern for a condensate but do not affect a spin polarized Fermi gas, where collisions at ultra cold temperatures are forbidden. Comparing the interference of the two quantum gases we find a clear superiority of fermions for trapped atom interferometry.

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