Extended Data Fig. 6: Collection of 28 single momentum-space projections taken at E_B/ħω_r = 0.

The images have been postselected for the correct particle number of the 6 + 6 ground state but are otherwise chosen randomly. The dashed circles indicate the Fermi momentum. All detected atom pairs with Δϕ < 30° and both p_↑ and p_↓ larger than 2/3p_F are highlighted. These are the particles that would contribute to the pair-correlation peak at the Fermi surface (see Fig. 2f). Without interactions we find no additional pairs other than what is expected already from the single-particle densities. Considerably more pairs are present in images taken at larger interaction strengths (compare Extended Data Fig. 5).