Seminarium Optyczne

We report on the realization of resonantly interacting Fermi mixtures of Li6 and Cr53atoms and the formation of Li6Cr53 bosonic Feshbach dimers. Employing a set of50 Feshbach resonances, observed in several spin combinations between 0 G and1500 G, we develop an accurate quantum collisional model for our system. From thiswe derive scattering lengths and unobserved resonance locations for Li6-Cr53, andprovide accurate predictions for the collisional properties of other Li-Cr isotopicpairs. We identify and characterize a set of strong s-wave resonances, essentiallyimmune to two-body inelastic losses, and obtain a magnetic field width of about0.5 G, in agreement with our model prediction. Exploiting one of these resonances,we show resonant tuning of inter-species elastic interactions in a thermal sample.Finally, we explain how we can reach simultaneous quantum degeneracy in ourmixture, and magneto-associate up to 30·103 Li6Cr53 Feshbach dimers. Our workpaves the way to the observation of novel few- and many-body phenomena in mass-imbalanced Fermi gases, and to the realization of ultracold samples of Li6Cr53ground-state molecules featuring both electric and magnetic dipole moments.

Seminarium z użyciem połączenia internetowegohttps://zoom.us/j/97696726563(meeting ID: 97696726563, password: 314297)