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\colorlet{mypurple}{red!50!blue!90!black!80}
% style to create arrows
\tikzset{
traj/.style 2 args={thick, postaction={decorate},decoration={markings,
mark=at position #1 with {\arrow{<}},
mark=at position #2 with {\arrow{<}}}
}
}
\begin{tikzpicture}[scale=0.6]
% p(t=0) = 0, q(t=0) = A, max(p) = mwA
\tikzmath{
\axh = 5.2;
\axw1 = 4.2;
\axw2 = 4.8;
\d1 = 0.9;
\a0 = 1;
\b0 = 2;
\a1 = \a0 + \d1;
\b1 = \b0 + \d1;
\a2 = \a1 + \d1;
\b2 = \b1 + \d1;
\a3 = \a2 + \d1;
\b3 = \b2 + \d1;
\d2 = 0.75;
\aa0 = 2;
\bb0 = 1;
\aa1 = \aa0 + \d2;
\bb1 = \bb0 + \d2;
\aa2 = \aa1 + \d2;
\bb2 = \bb1 + \d2;
\aa3 = \aa2 + \d2;
\bb3 = \bb2 + \d2;
}
\draw[->,thick] (-\axw1,0) -- (\axw1,0) node[right] {$q$};
\draw[->,thick] (0,-\axh) -- (0,\axh) node[above] {$p$};
\draw[traj={0.375}{0.875},darkgreen] ellipse (\a0 and \b0);
\draw[traj={0.375}{0.875},blue] ellipse (\a1 and \b1);
\draw[traj={0.375}{0.875},cyan] ellipse (\a2 and \b2);
\draw[traj={0.375}{0.875},mypurple] ellipse (\a3 and \b3);
\node[right,darkgreen] at (45:{\a0} and {\b0}) {$E_A$};
\node[right, blue] at (45:{\a1} and {\b1}) {$E_B$};
\node[right, cyan] at (45:{\a2} and {\b2}) {$E_C$};
\node[right, mypurple] at (45:{\a3} and {\b3}) {$E_D$};
\node[above left] at (110:\b3 + 0.1) {grosses $\omega$};
\begin{scope}[xshift=12cm]
\draw[->,thick] (-\axw2,0) -- (\axw2,0) node[right] {$q$};
\draw[->,thick] (0,-\axh) -- (0,\axh) node[above] {$p$};
\draw[traj={0.375}{0.875},darkgreen] ellipse (\aa0 and \bb0);
\draw[traj={0.375}{0.875},blue] ellipse (\aa1 and \bb1);
\draw[traj={0.375}{0.875},cyan] ellipse (\aa2 and \bb2);
\draw[traj={0.375}{0.875},mypurple] ellipse (\aa3 and \bb3);
\node[above, darkgreen] at (45:{\aa0} and {\bb0}) {$E_A$};
\node[above, blue] at (45:{\aa1} and {\bb1}) {$E_B$};
\node[above, cyan] at (45:{\aa2} and {\bb2}) {$E_C$};
\node[above, mypurple] at (45:{\aa3} and {\bb3}) {$E_D$};
\node[above left] at (110:\b3 + 0.1) {kleines $\omega$};
\end{scope}
\end{tikzpicture}
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