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arXiv 2303.15751hep-thcond-mat.mes-hallmath-phmath.MP
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A baby--Skyrme模型与各向异性DM相互作用:紧致斯格明子再探

A baby--Skyrme model with anisotropic DM interaction: Compact skyrmions revisited

Funa Hanada, Nobuyuki Sawado

AI总结:

本文研究带DMI和势项的baby--Skyrme模型,其能量泛函源自费米子行列式的热核展开,包含拓扑荷Q=1的斯格明子及紧致子解,并探讨指数局域化DMI的影响。

摘要:

我们考虑一个带有Dzyaloshinskii--Moriya相互作用(DMI)和两类势项的baby--Skyrme模型。该模型与耦合$O(3)$非线性$\m{n}$-场及常数$SU(2)$规范背景的费米子真空泛函有密切联系。能量泛函由费米子行列式的热核展开导出。该模型具有拓扑荷$Q = 1$的正常斯格明子。模型的受限版本还包括弱紧致子情形(在边界处不可连续微分)和真正紧致子情形(连续可微分)。该模型仅包含Skyrme项,DMI提供被称为“无任何势的斯格明子”的孤子解。超对称孤子模型中的BPS方程表明杂质耦合与DMI密切相关。因此,本文还研究了指数局域化DMI的影响。

英文摘要:

We consider a baby--Skyrme model with Dzyaloshinskii--Moriya interaction (DMI) and two types of potential terms. The model has a close connection with the vacuum functional of fermions coupled with $O(3)$ nonlinear $\bm{n}$-fields and with a constant $SU(2)$ gauge background. The energy functional is derived from the heat-kernel expansion for the fermion determinant. The model possesses normal skyrmions with topological charge $Q = 1$. The restricted version of the model also includes both the weak-compacton case (at the boundary, not continuously differentiable) and genuine-compacton case (continuously differentiable). The model consists of only the Skyrme term, and the DMI provides soliton solutions that are known as \textit{skyrmions without any potential}. The BPS equation in the supersymmetric soliton models implies that the impurity coupling is closely related to the DMI. Therefore, the effect of an exponentially localized DMI is also studied in the present model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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