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arXiv math-ph/0105024math-phhep-thmath.DGmath.MP
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S^2西格玛模型和(4+1)维Yang-Mills模型的快爆破和慢爆破

Fast and Slow Blowup in the S^2 Sigma Model and (4+1)-Dimensional Yang-Mills Model

Jean Marie Linhart, Lorenzo A. Sadun

摘要:

本文研究了(2+1)维S^2 σ模型和(4+1)维Yang-Mills模型的荷一扇区和荷二扇区球对称解在绝热极限附近的奇异性形成。这些方程是不可积的,因此研究旋转对称的解决方案,使用迭代有限差分格式,是数值稳定的数值。我们评估的精度与测地线近似的预测。我们发现,测地线近似是非常准确的电荷2 σ模型和杨米尔斯模型,这两个模型表现出快速爆破。电荷一σ模型表现出缓慢的爆破。在那里,测地线近似必须通过应用取决于初始条件的红外截止来修改。

英文摘要:

We study singularity formation in spherically symmetric solutions of the charge-one and charge-two sector of the (2+1)-dimensional S^2 sigma-model and the (4+1)-dimensional Yang-Mills model, near the adiabatic limit. These equations are non-integrable, and so studies are performed numerically on rotationally symmetric solutions using an iterative finite differencing scheme that is numerically stable. We evaluate the accuracy of predictions made with the geodesic approximation. We find that the geodesic approximation is extremely accurate for the charge-two sigma-model and the Yang-Mills model, both of which exhibit fast blowup. The charge-one sigma-model exhibits slow blowup. There the geodesic approximation must be modified by applying an infrared cutoff that depends on initial conditions.

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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