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arXiv 0705.0379hep-th
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任意亏格的超对称Q孤子

Supersymmetric Q Solitons of Arbitrary Genus

S. Bolognesi, M. Shifman

摘要:

我们在N=2的超对称规范理论中构造了“飞碟”孤子,该理论支持BPS畴壁,U(1)规范场局域在其世界体积上.我们证明了这个模型支持奇异的粒子状孤子的拓扑结构在很大程度上是任意的:在三维空间中的封闭定向表面,可以有任意的属。特别是,我们专注于Q托里。通过将畴壁折叠到适当的曲面上,得到了Q环面和类似的高阶孤子。畴壁世界体积(柄)上的非平凡循环由折叠畴壁内的交叉电场和磁场稳定。三个不同的框架被用来证明这些飞碟孤子的存在和研究其性质:世界体积描述(包括Dirac-Born-Infeld作用),体理论描述的sigma模型极限,和体理论描述的薄边近似。在西格玛模型框架中的Q环被证明是与以前研究的霍普夫Skyrmion。

英文摘要:

We construct "Flying Saucer" solitons in supersymmetric N=2 gauge theory which is known to support BPS domain walls with a U(1) gauge field localized on its worldvolume. We demonstrate that this model supports exotic particle-like solitons whose topology is largely arbitrary: closed orientable surfaces in three-dimensional space which can have arbitrary genus. In particular, we focus on Q tori. Q tori and similar solitons of higher genera are obtained by folding the domain wall into an appropriate surface. Nontrivial cycles on the domain wall worldvolume (handles) are stabilized by crossed electric and magnetic fields inside the folded domain wall. Three distinct frameworks are used to prove the existence of these Flying Saucer solitons and study their properties: the worldvolume description (including the Dirac-Born-Infeld action), the bulk theory description in the sigma-model limit, and the bulk theory description in the thin-edge approximation. In the sigma-model framework the Q torus is shown to be related to the Hopf Skyrmion studied previously.

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