Strongly magnetic atoms are an ideal system to study few- and many-body quantum phenomena
with anisotropic and long-range interactions. In this talk, we will provide an overview on the
scattering properties of a lanthanide species, namely Erbium. We will discuss the modification of the Wigner threshold law arising from the long-range character of the dipole-dipole interaction and show how dipolar scattering can be used to drive identical fermions to the quantum degenerate regime [1,2]. Moreover, we will present the peculiar dense spectrum of Feshbach resonances in Erbium and Dysprosium [3], discuss the origin of the effect, and present a detailed measurement of the s-wave scattering length by the use of a three-dimensional optical lattice. Our precise knowledge on the scattering length recently enabled us to study in detail the dipolar interaction in the work frame of the extended Bose-Hubbard model [4], as well as the formation of a macro-droplet of erbium atoms [5].
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