Coherent injecting, extracting, and velocity filtering of neutral atoms in a ring trap via spatial adiabatic passage

TitleCoherent injecting, extracting, and velocity filtering of neutral atoms in a ring trap via spatial adiabatic passage
Publication TypeJournal Article
Year of Publication2014
AuthorsLoiko, YV, Ahufinger, V, Menchon-Enrich, R, Birkl, G, Mompart, J
JournalEuropean Physical Journal D
Volume69
Start Page147
Issue6
Date Published06/2014
KeywordsOptics, Toroidal traps
Abstract

We introduce a coherent technique to inject, extract, and velocity filter neutral atoms in a ring trap coupled via tunneling to two additional waveguides. By adiabatically following the transverse spatial dark state, the proposed technique allows for an efficient and robust velocity dependent atomic population transfer between the ring and the input/output waveguides. We have derived explicit conditions for the spatial adiabatic passage that depend on the atomic velocity along the input waveguide as well as on the initial population distribution among the transverse vibrational states. The validity of our proposal has been checked by numerical integration of the corresponding two-dimensional Schrodinger equation with state-of-the-art parameter values for Rb-87 atoms and an optical dipole ring trap.

URLhttp://link.springer.com/article/10.1140/epjd/e2014-40696-3
DOI10.1140/epjd/e2014-40696-3
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