摘要: We observed the Efimov effect the existence of a series of bound three body states related to one another by a universal geometric scaling factor in a three-component Fermi gas. Our work was the first to observe, in any physical s... 展开 We observed the Efimov effect the existence of a series of bound three body states related to one another by a universal geometric scaling factor in a three-component Fermi gas. Our work was the first to observe, in any physical system, an excited Efimov trimer state. In related work, we created a degenerate Fermi gas with SU(3) symmetry, a first step toward the quantum simulation of phenomena in QCD such as color superconductivity. Working with two-component Fermi gases, we demonstrated that narrow Feshbach resonances could be used to explore Fermi gases with energy and momentum dependent s-wave interactions. We also observed, for the first time, an s-wave collisional frequency shift of a clock transition in a Fermi gas when a spatially inhomogeneous excitation field is used to interrogate the atoms. This work is directly relevant to state-of-the-art optical lattice clocks where spatial inhomogeneities in the clock field are nonnegligible since the field varies over the scale of an optical wavelength. Toward the study of strongly correlated Fermi gases, we have demonstrated the rapid control of interactions in a Fermi gas which will allow for diagnostics of strongly correlated Fermi gases of 6-Li and have implemented a site-resolved 2D triangular/honeycomb optical lattice which should permit the observation of anti-ferromagnetic ordering in the Hubbard model. 收起