Coherent injecting, extracting, and velocity filtering of neutral atoms in a ring trap via spatial adiabatic passageYury Loiko, Veronica Ahufinger, Ricard Menchon-Enrich, Gerhard Birkl and Jordi MompartEur. Phys. J. D, 68 6 (2014) 147DOI: https://doi.org/10.1140/epjd/e2014-40696-3