10.6084/m9.figshare.1012249.v1 M R Kamsap M R Kamsap T B Ekogo T B Ekogo J Pedregosa-Gutierrez J Pedregosa-Gutierrez G Hagel G Hagel M Houssin M Houssin O Morizot O Morizot M Knoop M Knoop C Champenois C Champenois Non-fidelity 1 − <em>F</em> = 1 − <em>P</em><sub>Q</sub> of the full transfer driven by Gaussian pulses plus weak coupling decay versus their duration and delay τ = Δ<em>t</em> (see equation (6)) IOP Publishing 2013 Gaussian pulses Raman adiabatic passage mhz structure components stirap state transfer transfer efficiency metastable states pq omega THz qubit Doppler shift Atomic Physics Molecular Physics 2013-06-21 00:00:00 Figure https://iop.figshare.com/articles/figure/_Non_fidelity_1_em_F_em_1_em_P_em_sub_Q_sub_of_the_full_transfer_driven_by_Gaussian_pulses_plus_weak/1012249 <p><strong>Figure 5.</strong> Non-fidelity 1 − <em>F</em> = 1 − <em>P</em><sub>Q</sub> of the full transfer driven by Gaussian pulses plus weak coupling decay versus their duration and delay τ = Δ<em>t</em> (see equation (<a href="http://iopscience.iop.org/0953-4075/46/14/145502/article#jpb467794eqn06" target="_blank">6</a>)). Laser parameters are Ω<sub><em>C</em></sub>/2π = 1 MHz, Δ<sub><em>C</em></sub>/2π = 10 MHz, \Omega _B^0/2\pi =200 MHz and \Omega _R^0/2\pi =20 MHz (filled square, blue dashed line), \Omega _B^0/2\pi =400 MHz and \Omega _R^0/2\pi =40 MHz (empty circle, red solid line), \Omega _B^0/2\pi =800 MHz and \Omega _R^0/2\pi =80 MHz (cross, green dot-dashed line), Δ<sub><em>B</em></sub>/2π = 100 MHz, and Δ<sub><em>R</em></sub> = Δ<sub><em>B</em></sub> − Δ<sub><em>C</em></sub> − α<sub><em>C</em></sub>Ω<sub><em>C</em></sub>/2.</p> <p><strong>Abstract</strong></p> <p>A stimulated Raman adiabatic passage (STIRAP)-like scheme is proposed to exploit a three-photon resonance taking place in alkaline-earth-metal ions. This scheme is designed for state transfer between the two fine structure components of the metastable D-state which are two excited states that can serve as optical or THz qubit. The advantage of a coherent three-photon process compared to a two-photon STIRAP lies in the possibility of exact cancellation of the first-order Doppler shift which opens the way for an application to a sample composed of many ions. The transfer efficiency and its dependence with experimental parameters are analysed by numerical simulations. This efficiency is shown to reach a fidelity as high as (1–8 <b>×</b> 10<sup>−5</sup>) with realistic parameters. The scheme is also extended to the synthesis of a linear combination of three stable or metastable states.</p>