Extended Data Fig. 3: Integrated momentum space density of 5+5 non-interacting atoms.
From: Emergent interaction-driven elliptic flow of few fermionic atoms

The measured and the calculated momentum density gets integrated along y- and x- direction (a and b, respectively). In the errors, the theoretical curve coincides with the experimental curves, showing that the non-interacting system is in the ground state of the harmonic oscillator potential.