\begin{tikzpicture}

% draw D-branes
\draw[thick] (-0.1cm, -0.6cm) -- (5.4cm, 3.5cm) node[anchor=south] {$D_{(1)}$};
\draw[thick] (3cm, -0.4cm) -- (5cm, 4.4cm) node[anchor=east] {$D_{(2)}$};
\draw[thick] (-0.5cm, 0cm) -- (5cm, 0cm) node[anchor=north west] {$D_{(3)}$};

% draw angles
\draw[dashed, ->] (3.75cm, 0cm) arc (0:65:0.6cm);
\draw[dashed, <-] (-0.1cm, 0cm) arc (180:225:0.6cm);
\draw[dashed, ->] (4.5cm, 3.35cm) arc (75:220:0.6cm);

% draw names
\node[anchor=north] at (4.5, 1cm) {$n_{0}^3 > 0$};
\node[anchor=south west] at (-0.5cm, 0.2cm) {$n_{1}^3 < 0$};
\node[anchor=north west] at (2cm, 3.25cm) {$n_{\infty}^3 > 0$};

\end{tikzpicture}

% vim: ft=tex