Exploring a Novel Chiral p-Wave Feshbach Resonance in Ultracold 40K

Ultracold atomic gases offer the unique ability to precisely tune interatomic interactions, most 
commonly through an external magnetic field near a Feshbach resonance. In degenerate Fermi gases 
with two balanced spin states, this tunability enables the exploration of regimes ranging from 
weakly interacting Fermi liquids to strongly interacting fermionic superfluids. In contrast, for a 
single-spin Fermi gas, symmetry forbids conventional isotropic s-wave interactions; instead, 
anisotropic p-wave interactions become allowed and dominate the scattering physics.
In this talk, I will present our investigation of a narrow, chiral p-wave Feshbach resonance in 40K
which we have recently observed. Unlike previously known resonances, this one is expected to 
exhibit chiral symmetry breaking by coupling states with specific and opposite projections of orbital 
angular momentum. We determine the resonance position and width from atom-loss spectroscopy, 
using both absorption imaging and fluorescence detection. Furthermore, by measuring decay rates 
over a range of magnetic fields, we identify three-body recombination as the dominant loss 
mechanism. This newly observed resonance offers a promising platform for realizing and exploring 
chiral p-wave superfluidity in a highly tunable atomic system