Double-slit interference with ultracold metastable neon atoms

Abstract
A double-slit interference of ultracold neon atoms in the 1s3 metastable state is studied. The interferometer is aligned vertically, and because of gravity acceleration the atom changes its velocity as much as 2 m/s during the passage of the interference. The interference fringes are observed for the initial atomic velocity between 0 and 2 m/s.