Figure 3 : 3D plot of the superposition state data.

From: Quantum test of the equivalence principle for atoms in coherent superposition of internal energy states

Figure 3

3D Lissajous figure obtained by plotting the output signal of the lower F=2 atom interferometer as a function of the output signals of the F=1 interferometers at the upper and lower clouds (black squares). The 3D ellipse best fitting the data (red line) and the orthogonal projections on the three Cartesian planes are also shown.