Abstract
We introduce the shaped-adiabatic-passage method that allows one to realize a complete population transfer from a given state ‖1> to superpositions of energy eigenstates ‖Ψ>= Σ k c k e - Ω k t ‖k of any desired composition. This objective can be achieved by using a shaped (dump or Stokes) laser pulse, formed by simultaneous monochromatic pulses of the same smooth profile, resonantly coupling the states ‖k with a single intermediate state ‖2>. followed by a (pump or anti-Stokes) pulse, coupling this intermediate state with the initial state ‖1>. The pulse shapes can be obtained from first-order perturbation theory, so the method can be used for efficient information coding in the form of superpositions of atomic Rydberg states or of molecular vibrational states.
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