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arXiv 1710.03045hep-thmath-phmath.MP
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$(d+1)$维场论中孤子的边界电荷和积分恒等式

Boundary charges and integral identities for solitons in $(d+1)$-dimensional field theories

Sven Bjarke Gudnason, Zhifeng Gao, Yisong Yang

摘要:

我们建立了一个3参数族的积分恒等式,用于一类理论拥有孤子与球对称$d$空间维度。该结构提供了五个边界电荷,这些电荷与所讨论的孤子的轮廓函数的某些积分有关。该框架是相当通用的,我们给出的例子都拓扑缺陷(如旋涡和单极)和拓扑纹理(如Skyrmions)在2和3维。这里考虑的一类理论是基于一个动力学项和三个泛函经常遇到的减少拉格朗日孤子。一个特别有趣的情况下,提供了一个推广的著名Pohozaev身份。然而,我们的构造与德里克定理和维里关系背后的尺度参数有着根本的不同。对于BPS涡,有趣的是,我们发现一个无穷的积分只是有关的拓扑缠绕数。

英文摘要:

We establish a 3-parameter family of integral identities to be used on a class of theories possessing solitons with spherical symmetry in $d$ spatial dimensions. The construction provides five boundary charges that are related to certain integrals of the profile functions of the solitons in question. The framework is quite generic and we give examples of both topological defects (like vortices and monopoles) and topological textures (like Skyrmions) in 2 and 3 dimensions. The class of theories considered here is based on a kinetic term and three functionals often encountered in reduced Lagrangians for solitons. One particularly interesting case provides a generalization of the well-known Pohozaev identity. Our construction, however, is fundamentally different from scaling arguments behind Derrick's theorem and virial relations. For BPS vortices, we find interestingly an infinity of integrals simply related to the topological winding number.

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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