论文标题
相位分离和巡回磁性的相互作用，以相关的双孔中的几个费物
Interplay of phase separation and itinerant magnetism for correlated few fermions in a double-well
论文作者
论文摘要
我们探讨了相位分离现象的稳定性，几乎没有特劳型旋转$ 1/2 $的系统。结果表明，在SU（2）对称情况下，在保守总自旋的情况下，相位分离不能完全稳定。中间相互作用出现了以亚稳态相距为特征的相互作用制度，这与每个井中发出的铁磁自旋旋转相关性固有地相关。 SU（2）对称性的破裂至关重要地影响系统的稳定性，因为即使对于弱磁电势梯度，相位分离状态也可以稳定。我们的结果暗示着相位分离现象与铁磁势的现象之间存在复杂的关系，而这些现象超出了石膏不稳定性的视野。
We explore the stability of the phase separation phenomenon in few-fermion spin-$1/2$ systems confined in a double-well potential. It is shown that within the SU(2) symmetric case, where the total spin is conserved, the phase separation cannot be fully stabilized. An interaction regime characterized by metastable phase separation emerges for intermediate interactions which is inherently related with ferromagnetic spin-spin correlations emanating within each of the wells. The breaking of the SU(2) symmetry crucially affects the stability properties of the system as the phase separated state can be stabilized even for weak magnetic potential gradients. Our results imply an intricate relation between the phenomena of phase separation and ferromagnetism that lies beyond the view of the Stoner instability.
