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Precision control of charge coherence in parallel double dot systems through spin-orbit interaction
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10.1063/1.4817850
/content/aip/journal/jcp/139/6/10.1063/1.4817850
http://aip.metastore.ingenta.com/content/aip/journal/jcp/139/6/10.1063/1.4817850
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic plot of a double quantum dot coupled in parallel with a half-metallic ferromagnetic lead. Two excess electronic states in each dot constitutes a charge qubit.

Image of FIG. 2.
FIG. 2.

(a) The time evolution of electron population in the dots, and (b) the coherence in the steady limit varying with flux ϕ for different bias μ = . The initial temperature β = = 0.1Γ.

Image of FIG. 3.
FIG. 3.

The coherence manipulation of the related phase ϕ() = ϕ(mod 2π) between the two double dot states through the sequence temporal short pulses ().

Image of FIG. 4.
FIG. 4.

(a) A 3D-plot of stationary coherent magnitude of ρ with the temperature and the Fermi surface at μ = μ + ε. (b) The coherence dynamics of the double dot with a small inter-dot coupling, ε = 2.5%Γ. (c) The coherence dynamics and its stationary distribution deviated away from the degenerate electronic states, with energy level difference ε = ε − ε = 5%Γ. Other parameters = 0.1Γ, ε = 2Γ, and μ = = 10Γ.

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/content/aip/journal/jcp/139/6/10.1063/1.4817850
2013-08-13
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Precision control of charge coherence in parallel double dot systems through spin-orbit interaction
http://aip.metastore.ingenta.com/content/aip/journal/jcp/139/6/10.1063/1.4817850
10.1063/1.4817850
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