论文标题

自旋轨道耦合自旋-2冷凝物中的超酚样孤子

Supersolid-like solitons in spin-orbit coupled spin-2 condensate

论文作者

Kaur, Pardeep, Gautam, Sandeep, Adhikari, S. K.

论文摘要

我们研究了准二维自旋轨道(SO)在铁磁,环状和抗弗弗诺磁性相的固定状态(SO)耦合的自旋-2凝结物的固定状态中出现的超固体结晶结构在紧急解决方案中。对于小型的所谓耦合强度$γ$($γ\约0.5 $),基态是一种轴对称的多环孤子,用于极性,环状和弱磁性相互作用,而对于圆形相互作用的圆形相互作用,与基础相同的参与物相处得出了,则循环相互作用的较强相互作用是在循环中的相互作用。强度,条纹相也可能是极性和环状相互作用的基态。对于SO偶联强度的中间值($γ\ 1 $),除了这些孤子外,在所有磁相中,都可以具有准脱位三角晶格孤子。为了进一步提高所谓耦合强度($γ\ gtrapprox 4 $),正方形晶格和超级索尼顿出现为准替代状态。所有这些孤子的出现都可以从对单粒子哈密顿式溶液的研究来推断。

We study supersolid-like crystalline structures emerging in the stationary states of a quasi-two-dimensional spin-orbit (SO)-coupled spin-2 condensate in the ferromagnetic, cyclic, and antiferro-magnetic phases by solving a mean-field model.Interplay of different strengths of SO coupling and interatomic interactions gives rise to a variety of non-trivial density patterns in the emergent solutions. For small SO-coupling strengths $γ$ ($γ\approx 0.5$), the ground state is an axisymmetric multi-ring soliton for polar, cyclic and weakly-ferromagnetic interactions, whereas for stronger-ferromagnetic interactions a circularly-asymmetric soliton emerges as the ground state.Depending on the values of interaction parameters, with an increase in SO-coupling strength, a stripe phase may also emerge as the ground state for polar and cyclic interactions. For intermediate values of SO-coupling strength ($γ\approx 1$), in addition to these solitons, one could have a quasi-degenerate triangular-lattice soliton in all magnetic phases. On further increasing the SO-coupling strength ($γ\gtrapprox 4$), a square-lattice and a superstripe soliton emerge as quasi-degenerate states. The emergence of all these solitons can be inferred from a study of solutions of the single-particle Hamiltonian.

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