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arXiv 1004.4399hep-th
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杂化理论中Hermitian Yang-Mills联络与向量丛稳定性的数值研究

Numerical Hermitian Yang-Mills Connections and Vector Bundle Stability in Heterotic Theories

Lara B. Anderson, Volker Braun, Robert L. Karp, Burt A. Ovrut

摘要:

给出了一个显式计算Calabi-Yau流形上斜率稳定全纯向量丛规范联络的数值算法。为了说明这个算法,我们计算的连接上定义的K3二重和五次三重稳定单子丛。引入误差测量来确定我们的算法连接如何接近埃尔米特杨-米尔斯方程的解。然后,我们通过研究非斜率稳定丛的行为来扩展我们的结果。在各种各样的例子中,它表明,这些束满足厄米杨-米尔斯方程,包括场强奇点的故障,可以准确地再现数值。这些结果使得在数值上确定矢量丛是否斜率稳定成为可能,从而为探索杂种优势真空提供了一个重要的新工具。

英文摘要:

A numerical algorithm is presented for explicitly computing the gauge connection on slope-stable holomorphic vector bundles on Calabi-Yau manifolds. To illustrate this algorithm, we calculate the connections on stable monad bundles defined on the K3 twofold and Quintic threefold. An error measure is introduced to determine how closely our algorithmic connection approximates a solution to the Hermitian Yang-Mills equations. We then extend our results by investigating the behavior of non slope-stable bundles. In a variety of examples, it is shown that the failure of these bundles to satisfy the Hermitian Yang-Mills equations, including field-strength singularities, can be accurately reproduced numerically. These results make it possible to numerically determine whether or not a vector bundle is slope-stable, thus providing an important new tool in the exploration of heterotic vacua.

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