Extended Data Fig. 5: Matrix elements of NaLi–NaLi interactions.
From: A Feshbach resonance in collisions between triplet ground-state molecules
Matrix elements of the NaLi–NaLi interaction at R = 100 nm as a function of the channel index labelling the basis states |γAγBlmlη⟩. The initial channel is |aa, l = 1, ml = 0⟩ and the total angular momentum projection Mtot = −7. The channel index labels closed channels, in which one or both NaLi molecules are in their N ≥ 1 excited rotational states. Only the matrix elements with the absolute magnitude exceeding 1 Hz are plotted. The magnetic field B = 333 G is tuned near the crossing between the |a⟩ and |b1⟩ hyperfine-Zeeman levels. Inset, histogram of direct coupling matrix elements between the incident channel and lower-lying open channels, in which both NaLi molecules are in the ground N = 0 rotational states.
