title: Realization of a SU(2)×SU(6) system of fermions in a cold atomic gas.
abstract: We report the realization of a novel degenerate Fermi mixture with an SU(2)×SU(6) symmetry in a cold atomic gas. We successfully cool the mixture of the two fermionic isotopes of ytterbium 171Yb with the nuclear spin I=1/2 and 173Yb with I=5/2 below the Fermi temperature T_{F} as 0.46TF for 171Yb and 0.54TF for 173Yb. The same scattering lengths for different spin components make this mixture featured with the novel SU(2)×SU(6) symmetry. The nuclear spin components are separately imaged by exploiting an optical Stern-Gerlach effect. In addition, the mixture is loaded into a 3D optical lattice to implement the SU(2)×SU(6) Hubbard model. This mixture will open the door to the study of novel quantum phases such as a spinor Bardeen-Cooper-Schrieffer-like fermionic superfluid.
authors.affiliation: Department of Physics, Graduate School of Science, Kyoto University, Japan 606-8502. taie@scphys.kyoto-u.ac.jp
authors.forename: Shintaro
authors.initials: S
authors.lastname: Taie
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Takasu
authors.forename: Seiji
authors.initials: S
authors.lastname: Sugawa
authors.forename: Rekishu
authors.initials: R
authors.lastname: Yamazaki
authors.forename: Takuya
authors.initials: T
authors.lastname: Tsujimoto
authors.forename: Ryo
authors.initials: R
authors.lastname: Murakami
authors.forename: Yoshiro
authors.initials: Y
authors.lastname: Takahashi