Long-lived fermionic Feshbach molecules with tunable $p$-wave interactions

• DOI: 10.48550/arxiv.2202.06940
• Publication Date: 2022-01-01
• Authors: Marcel DUDA; Xing-Yan Chen; Roman Bause; Andreas Schindewolf; Immanuel Bloch; Xinyu Luo
• Keywords: Feshbach resonance; Thermalisation

Ultracold fermionic Feshbach molecules are promising candidates for exploring quantum matter with strong $p$-wave interactions, however, their lifetimes were measured to be short. Here, we characterize the collisions of ultracold $^{23}\mathrm{Na}^{40}\mathrm{K}$ different scattering lengths and temperatures. By increasing binding energy molecules, two-body loss coefficient reduces by three orders magnitude leading a second-long lifetime, 20 times longer than that ground-state molecules. We exploit scaling elastic inelastic length temperature identify regime where dominate over ones allowing molecular sample thermalize. Our work provides benchmark four-body calculations is essential producing degenerate Fermi gas