Fig. 2: Demonstration of coherent shuttling by EPR-pair separation and joined spin-singlet detection.
From: Spin-EPR-pair separation by conveyor-mode single electron shuttling in Si/SiGe
a, b ST0-oscillations as a function of the shuttling time τS and the qubit shuttle distance d at B = 0.8 T (panel a) and B = 0.6 T (panel b), respectively. c: Least-square fit to the data in panel a. d: Least-square fit to the data in b. e Frequencies extracted from the fit in c. The two frequencies are plotted with their corresponding a<,> encoded in the dot size. f: Ratio of the upper and lower frequency for each magnetic field. g Ensemble spin dephasing time \({T}_{2}^{*}\) of the EPR pair as a function of shuttling distance with 1σ-error. Red and purple lines represent least-square fits of two different fit functions. h: Singlet probability PS recorded after shuttling for 0.5D periods of cumulative distance. The time τS + τDQD is the sum of the shuttle time τS and the time of recording the ST0-oscillations in the DQD τDQD. For clarity, traces are offset and amplitude is scaled for purple data points (D = 8λ, D = 10λ and D = 12λ), for which a zoom-in version is plotted in Supplementary Fig. 2.
