Efficient coherent internal state transfer in trapped ions using stimulated Raman adiabatic passage

Abstract

We demonstrate experimentally how the process of Stimulated Raman Adiabatic Passage (STIRAP) can be utilized for efficient coherent internal state transfer in single trapped and laser-cooled 40 Ca + ions. The transfer from the D 3/2 to the D 5/2 state, is detected by a fluorescence measurement revealing the population not transfered to the D 5/2 state. A coherent population transfer efficiency at the level of 95 % in a setup allowing for the internal state detection of individual ions in a string has been obtained.

Efficient qubit detection using alkaline-earth-metal ions and a double stimulated Raman adiabatic process

“…STIRAP has been shown to be a robust way of adiabatically transferring population from one quantum state to another in a three level lambda-system using two laser pulses in a counterintuitive order [28,30,31,32,33,34,35,36,37]. Compared to population transfer via π-pulses or rapid adiabatic passage, STIRAP has the advantage that no strict control of laser amplitude and phase is required to maintain a high efficiency [38].…”

Stimulated Raman adiabatic passage preparation of a coherent superposition of ThOH3Δ1states for an improved electron electric-dipole-moment measurement

“…Although STIRAP has been performed in a number of atomic and molecular-beam experiments [22][23][24][25][26][27], each system presents its own difficulties. STIRAP within the ACME experiment is challenging for several reasons, which mostly arise from the fact that we are operating with lasers with power outputs that are close to our minimum requirements for efficient population transfer.…”

“…The process relies on the adiabatic evolution of a "dark" (i.e., not coupled to the radiation fields), population-trapping state as molecules (or atoms) experience partially overlapping slowly varying fields: a Stokes pulse that introduces a dynamic Stark splitting of the unpopulated states |2 and |3 is followed by a pump pulse, coupling states |1 and |2 . Since its discovery and first demonstration with Na 2 dimers [22], STIRAP has been successfully applied to a number of experiments, such as in the preparation of ultracold dense gases of polar molecules [23,24], the creation of a well-defined photon number state in single-atom cavity quantum electrodynamics [25,26], and quantum-information processing [27,28].…”

Geometric phases in open tripod systems

“…In the method two laser fields are applied to the atomic lambda system [see Fig. 1(a)] [10,12,13,14,15,16,17,18]. The instantaneous adiabatic dressed states for this system are two bright states and one dark state.…”