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--- test2 [August 24, 2026 at 15:05] – Ivan Janevski
+++ test2 [August 24, 2026 at 15:14] (current) – Ivan Janevski
@@ Line 2: / Line 2: @@
 \usepackage{blochsphere}
-\usetikzlibrary{angles,quotes}
 \begin{document}
-\def\thetaAngle{50}
+\def\thetaAngle{90}
-\def\phiAngle{40}
+\def\phiAngle{0}
-\begin{blochsphere}[radius=3cm,tilt=15,rotation=-20,ball=circle]
+\begin{blochsphere}[radius=2cm,tilt=15,rotation=-20,ball=circle]
     \drawBallGrid[style={opacity=0.15}]{30}{30}
-    \labelLatLon{ket0}{90}{0}
+    \drawStatePolar[axisarrow=true,statewidth=0.3]{xaxis}{90}{90}
-    \labelLatLon{ket1}{-90}{0}
+    \drawStatePolar[axisarrow=true,statewidth=0.3]{yaxis}{90}{0}
-    \labelLatLon{xaxis}{0}{0}
+    \drawStatePolar[axisarrow=true,statewidth=0.3]{zaxis}{0}{0}
-    \labelLatLon{yaxis}{0}{-90}
-    % blochsphere uses latitude here, hence 90-theta
+    %\node[left] at (xaxis) {$x$};
-    \labelLatLon{state}{90-\thetaAngle}{-\phiAngle}
+    \node[right] at (yaxis) {$y$};
+    \node[above] at (zaxis) {$z$};
-    \draw[->] (0,0) -- (xaxis) node[right] {$x$};
+    \drawStatePolar[statecolor=red,statewidth=0.7]{state}{\thetaAngle}{90-\phiAngle}
-    \draw[->] (0,0) -- (yaxis) node[right] {$y$};
+    \node[below right] at (state) {$|+\rangle$};
-    \draw[->] (0,0) -- (ket0) node[above] {$|0\rangle$};
-    \draw[red,very thick,->] (0,0) -- (state);
+    \labelLatLon{north}{90}{0}
-    \node[right] at (state) {$|\psi\rangle$};
+    \labelLatLon{south}{-90}{0}
-    \node[below] at (ket1) {$|1\rangle$};
+    \node[above] at (north) {$|0\rangle$};
+    \node[below] at (south) {$|1\rangle$};
-    \coordinate (origin) at (0,0);
-    % phi: equatorial plane
-    {
-        \setDrawingPlane{0}{0}
-        \draw[current plane,dashed]
-            (0,0) --
-            (-90+\phiAngle:{cos(\thetaAngle)*3cm})
-            coordinate (projection);
-        \pic[
-            current plane,
-            draw,
-            fill=gray,
-            fill opacity=0.15,
-            text opacity=1,
-            "$\phi$",
-            angle radius=0.7cm,
-            angle eccentricity=1.35
-        ] {angle=xaxis--origin--projection};
-    }
-    % theta: longitudinal plane through |psi>
-    {
-        \setLongitudinalDrawingPlane{\phiAngle}
-        \pic[
-            current plane,
-            draw,
-            fill=gray,
-            fill opacity=0.15,
-            text opacity=1,
-            "$\theta$",
-            angle radius=0.8cm,
-            angle eccentricity=1.35
-        ] {angle=state--origin--ket0};
-    }
 \end{blochsphere}
 \end{document}