Ring solitons and soliton sacks in imbalanced fermionic systems
Ring solitons and soliton sacks in imbalanced fermionic systems
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DOI：
10.1103/physrevresearch.2.043282
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发表时间：
2020-11-25
影响因子：
4.2
通讯作者：
Babaev, Egor
中科院分区：
文献类型：
--
作者：
Barkman, Mats;Samoilenka, Albert;Babaev, Egor
我们证明，在费米子不平衡和均匀基态的超流体中，存在稳定的孤子。这些解决方案由径向密度调制形成，从而产生节环。我们证明这些孤子表现出非平凡的孤子-孤子和孤子-涡相互作用，并且可以以“孤子袋”的形式形成复杂的束缚态。在相位调制（富尔德-费雷尔）背景中，我们发现不同的孤子态，以稳定的涡旋-反涡旋对的形式存在。
We show that in superfluids with fermionic imbalance and uniform ground state, there are stable solitons. These solutions are formed of radial density modulations resulting in nodal rings. We demonstrate that these solitons exhibit nontrivial soliton-soliton and soliton-vortex interactions and can form complicated bound states in the form of "soliton sacks." In a phase-modulating (Fulde-Ferrell) background, we find different solitonic states, in the form of stable vortex-antivortex pairs.