10.6084/m9.figshare.1012249.v1
M R Kamsap
T B Ekogo
J Pedregosa-Gutierrez
G Hagel
M Houssin
O Morizot
M Knoop
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))
2013
IOP Publishing
Gaussian pulses
Raman adiabatic passage
mhz
structure components
stirap
state transfer
transfer efficiency
metastable states
pq
omega
THz qubit
Doppler shift
2013-06-21 00:00:00
article
https://iop.figshare.com/articles/_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>