一维光晶格中的三组分费米气体
Three-Component Fermi Gas in a one-dimensional Optical Lattice
摘要：
研究了一维光晶格中三组分费米气体的s波散射长度的各向异性效应。我们发现四个不同的阶段，支持三个费米子的束缚态的三电子不稳定性。这些相位通过三种物质的2个$k_F$原子密度波波动之间的相对相位来区分自己。在足够小的密度或强的各向异性，我们给出了进一步的证据去耦和更传统的BCS阶段的稳定。最后结合最近的$^{6}$ Li原子实验对我们的结果进行了讨论。
英文摘要：
We investigate the effect of the anisotropy between the s-wave scattering lengths of a three-component atomic Fermi gas loaded into a one-dimensional optical lattice. We find four different phases which support trionic instabilities made of bound states of three fermions. These phases distinguish themselves by the relative phases between the 2$k_F$ atomic density waves fluctuations of the three species. At small enough densities or strong anisotropies we give further evidences for a decoupling and the stabilization of more conventional BCS phases. Finally our results are discussed in light of a recent experiment on $^{6}$Li atoms.
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