Experimental measurement and manipulation of unitary fermionic p-wave interactions in a 3D optical lattice

Resonantly enhanced and controllable p-wave interactions in ultracold atomic systems are a promising test bed for realizing exotic many-body states. However, strong three-body loss has traditionally limited experiments to systems of low dimensionality. In this work, we report on experimental spectroscopic measurements of Feshbach-enhanced p-wave interactions of 40K, where three-body loss is suppressed by loading spin polarized atoms in a deep 3D optical lattice. The resultant interaction energy shifts are in good agreement with analytic predictions of the two-body problem across the Feshbach resonance. The observed lifetimes of strongly interacting pairs (doublons) are consistent with predictions of two-body loss from dipolar relaxation and exceed tens of milliseconds. Measured Rabi oscillations between interacting and non-interacting doublons demonstrate the possibility of coherent manipulation of p-wave Feshbach molecules. These pioneering experiments test theoretical predictions of two-body p-wave interactions and opens doors towards realizing novel many-body states with them.