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arXiv 2106.01353hep-thmath-phmath.MPnlin.SI
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反自对偶规范场的多孤子动力学

Multi-Soliton Dynamics of Anti-Self-Dual Gauge Fields

Masashi Hamanaka, Shan-Chi Huang

摘要:

研究了四维空间中反自对偶Yang-Mills方程G=GL(2,C)的多孤子解的动力学性质.在四维空间中,单孤子解可以解释为余维一孤子,因为作用密度的主峰位于三维超平面上。我们称之为孤立子墙。我们证明了在渐近区域,n孤子解具有n个孤立的局部作用密度块,并将其解释为n个相交的孤子壁。更确切地说,每个作用密度块本质上与孤子壁相同,因为它保持其形状和“速度”,除了在散射过程中主峰的位置移动。这种位置移动是由多孤子间的非线性相互作用引起的,称为相移。我们明确地计算了相移因子,发现在三种签名中,作用密度都可以是实值的。最后,我们证明了超双曲空间中的规范群G=U(2)(分裂签名(+,+,-,-))。这意味着在N=2的弦论中,相交孤子壁可以在所有区域实现。值得注意的是,拟行列式极大地简化了计算和证明。

英文摘要:

We study dynamics of multi-soliton solutions of anti-self-dual Yang-Mills equations for G=GL(2,C) in four-dimensional spaces. The one-soliton solution can be interpreted as a codimension-one soliton in four-dimensional spaces because the principal peak of action density localizes on a three-dimensional hyperplane. We call it the soliton wall. We prove that in the asymptotic region, the n-soliton solution possesses n isolated localized lumps of action density, and interpret it as n intersecting soliton walls. More precisely, each action density lump is essentially the same as a soliton wall because it preserves its shape and "velocity" except for a position shift of principal peak in the scattering process. The position shift results from the nonlinear interactions of the multi-solitons and is called the phase shift. We calculate the phase shift factors explicitly and find that the action densities can be real-valued in three kind of signatures. Finally, we show that the gauge group can be G=U(2) in the Ultrahyperbolic space (the split signature (+, +, -, -)). This implies that the intersecting soliton walls could be realized in all region in N=2 string theories. It is remarkable that quasideterminants dramatically simplify the calculations and proofs.

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