论文标题
Spin-3/2 Fermi气体中的近托效应
Kondo Effect in a Spin-3/2 Fermi Gas
论文作者
论文摘要
我们研究了Spin-3/2费米气体的围关系，并根据S-D交换模型对杂质抗性和基态能量进行详细计算。发现在抗铁磁耦合的情况下，与SPIN-1/2系统相似的情况下，杂质抗性随温度的降低而增加，但由于自旋散射通道的增加而具有较大的电阻最小值。在抗铁磁相互作用的情况下，基态仍然是近野单重状态，而SEPTUPETET状态的铁磁偶联能量最低。而且，使用相同的抗磁性S-D耦合参数，Kondo Singlet状态的能量低于Spin-1/2，这表明较大的自旋，进入昆多屏幕相位就越容易。这为用超冷原子实现近藤效应的理论支持提供了一些理论支持。
We investigate the Kondo effect of a spin-3/2 Fermi gas and give a detailed calculation of the impurity resistance and ground state energy based on the s-d exchange model. It is found that the impurity resistance increases logarithmically with the decrease of temperature in the case of antiferromagnetic coupling similar to the spin-1/2 system but has a larger resistance minimum value due to the increase of spin scattering channels. In the case of antiferromagnetic interaction, the ground state is still the Kondo singlet state while the septuplet state has the lowest energy for ferromagnetic coupling. And with the same antiferromagnetic s-d coupling parameter, the energy of the Kondo singlet state is lower than spin-1/2, which indicates that the larger spin, the easier it is to enter the Kondo-screened phase. This provides some theoretical support for the realization of the Kondo effect with ultra-cold atoms.
