Extended Data Fig. 5: Collection of 28 single momentum-space projections taken at EB/ħωr = 1.97.
From: Observation of Cooper pairs in a mesoscopic two-dimensional Fermi gas
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. Atoms pairs with Δϕ < 30° and p↑ and p↓ larger than 2/3pF are highlighted. These are the particles that contribute to the pair-correlation peak at the Fermi surface (see Fig. 2i). We find considerably more such pairs in images taken at larger interaction strengths (compare Extended Data Fig. 6).
