perfect_transfer.tex

Paper VII: Quantum Seed Calculus

perfect_transfer.tex

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1 \begin{tikzpicture}[x=1cm,y=1cm,>=Stealth,line cap=round,line join=round]
2 \path[use as bounding box] (0,-.6) rectangle (14,4.8);
3 \draw[black!70,line width=.7pt] (1.5,2.8) -- (4.5,2.8);
4 \draw[black!70,line width=.7pt] (4.5,2.8) -- (4.5,0.7);
5 \draw[black!70,line width=.7pt] (4.5,0.7) -- (1.5,0.7);
6 \draw[black!70,line width=.7pt] (1.5,0.7) -- (1.5,2.8);
7 \path[draw,fill=white] (1.5,2.8) circle (0.24);
8 \node[font=\small,align=center,font=\small] at (1.5,2.8) {0};
9 \path[draw,fill=white] (4.5,2.8) circle (0.24);
10 \node[font=\small,align=center,font=\small] at (4.5,2.8) {1};
11 \path[draw,fill=white] (4.5,0.7) circle (0.24);
12 \node[font=\small,align=center,font=\small] at (4.5,0.7) {2};
13 \path[draw,fill=white] (1.5,0.7) circle (0.24);
14 \node[font=\small,align=center,font=\small] at (1.5,0.7) {3};
15 \draw[->,dashed,line width=.95pt,shorten <=0.27cm,shorten >=0.27cm] (1.5,2.8) -- (4.5,0.7);
16 \node[font=\small,align=center] at (3,4.15) {$e^{-\ii\pi L/2}=S^2$};
17 \node[font=\small,align=center,font=\small] at (8.895,4.25) {start};
18 \path[draw=black!30,fill=black!8] (8.6,2.96) rectangle (9.19,3.55);
19 \node[font=\small,align=center,font=\small] at (8.895,3.255) {$1$};
20 \path[draw=black!30,fill=white] (8.6,2.37) rectangle (9.19,2.96);
21 \node[font=\small,align=center,font=\small] at (8.895,2.665) {$0$};
22 \path[draw=black!30,fill=white] (8.6,1.78) rectangle (9.19,2.37);
23 \node[font=\small,align=center,font=\small] at (8.895,2.075) {$0$};
24 \path[draw=black!30,fill=white] (8.6,1.19) rectangle (9.19,1.78);
25 \node[font=\small,align=center,font=\small] at (8.895,1.485) {$0$};
26 \node[font=\small,align=center,font=\small] at (11.695,4.25) {time $\pi/2$};
27 \path[draw=black!30,fill=white] (11.4,2.96) rectangle (11.99,3.55);
28 \node[font=\small,align=center,font=\small] at (11.695,3.255) {$0$};
29 \path[draw=black!30,fill=white] (11.4,2.37) rectangle (11.99,2.96);
30 \node[font=\small,align=center,font=\small] at (11.695,2.665) {$0$};
31 \path[draw=black!30,fill=black!8] (11.4,1.78) rectangle (11.99,2.37);
32 \node[font=\small,align=center,font=\small] at (11.695,2.075) {$1$};
33 \path[draw=black!30,fill=white] (11.4,1.19) rectangle (11.99,1.78);
34 \node[font=\small,align=center,font=\small] at (11.695,1.485) {$0$};
35 \node[font=\small,align=center,font=\small] at (10.3,0.5) {Target probability after partial\\momentum dephasing: $1-3\eta/4$.};
36 \end{tikzpicture}

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