Realization of a SU(2) X SU(6) System of Fermions in a Cold Atomic Gas
Realization of a SU(2) X SU(6) System of Fermions in a Cold Atomic Gas
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DOI：
10.1103/physrevlett.105.190401
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发表时间：
2010-11-01
影响因子：
8.6
通讯作者：
Takahashi, Yoshiro
中科院分区：
文献类型：
--
作者：
Taie, Shintaro;Takasu, Yosuke;Takahashi, Yoshiro
报道了在冷原子气体中实现一种新的SU（2）× SU（6）对称性简并费米混合物。我们成功地冷却了Yb-171（核自旋I = 1/2）和Yb-173（核自旋I = 5/2）的两种费米同位素的混合物，使其低于费米温度T-F（Yb-171为0.46T（F），Yb-173为0.54T（F））。不同自旋分量的散射长度相同，使得该混合物具有新颖的SU（2）XSU（6）对称性。利用光学Stern-Gerlach效应对核自旋分量分别成像。此外，混合物被加载到一个3D光学晶格中，以实现SU（2）x SU（6）Hubbard模型。这种混合物将为研究新的量子相打开大门，例如旋量Bardeen-Cooper-Schrifford类费米超流体。
We report the realization of a novel degenerate Fermi mixture with an SU(2) X SU(6) symmetry in a cold atomic gas. We successfully cool the mixture of the two fermionic isotopes of ytterbium Yb-171 with the nuclear spin I = 1/2 and Yb-173 with I = 5/2 below the Fermi temperature T-F as 0.46T(F) for Yb-171 and 0.54T(F) for Yb-173. The same scattering lengths for different spin components make this mixture featured with the novel SU(2) X 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) x 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.