Adiabatic rapid passage atomic beamsplitter using frequency-swept coherent laser beam pairs

摘要

Methods and apparatus for providing coherent atom population transfer using coherent laser beam pairs in which the frequency difference between the beams of a pair is swept over time. Certain examples include a Raman pulse adiabatic rapid passage sweep regimen configured to be used as a beamsplitter and combiner in conjunction with an adiabatic rapid passage mirror sweep or a standard Raman mirror pulse in a 3-pulse interferometer sequence.

主权项

1. A method for controllably translating an atom comprising:
providing an effective drive field derived from mixing a pair of electromagnetic waves of first and second time-varying frequencies having a time-varying frequency difference between the first and second time-varying frequencies to generate a coherent electromagnetic energy of a third time-varying frequency; applying and directing the coherent electromagnetic energy pulse form of preselected area, duration, polarization, and time-dependent frequency difference sweep range at the atom thereby inducing adiabatic Raman transitions between two distinct internal quantum levels in the atom to change momentum of the atom; observing the internal quantum state of the atom to determine the momentum of the atom; and determining a velocity of the atom based on the momentum of the atom.