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arXiv 1211.3262hep-th
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多中心一阶形式

Multi-Centered First Order Formalism

Sergio Ferrara, Alessio Marrani, Andrey Shcherbakov, Armen Yeranyan

摘要:

在N=2,D=4的无规范Maxwell-Einstein超引力STU模型下,给出了具有平坦三维基空间的多中心黑洞的一阶形式.这提供了所有模型的这个通用扇区的一阶流的统一描述,具有对称标量流形,可以通过从五维降维来获得。我们开发了一个D=3的笛卡尔形式主义,适当地扩展了中心和物质电荷的定义,以及黑洞有效势和一阶“假”超势,以处理不一定轴对称的解决方案,从而与多中心和/或(下)旋转极值黑洞。我们推导出一般的一阶流方程的复合非BPS和几乎BPS类,我们分析了他们的一些解决方案,检索各种单中心(静态或旋转下)和多中心已知系统。在t^3模型中,几乎BPS类分裂成两个一般分支,而著名的几乎BPS系统被证明是第二个分支的特解。

英文摘要:

We propose a first order formalism for multi-centered black holes with flat tree-dimensional base-space, within the stu model of N=2, D=4 ungauged Maxwell-Einstein supergravity. This provides a unified description of first order flows of this universal sector of all models with a symmetric scalar manifold which can be obtained by dimensional reduction from five dimensions. We develop a D=3 Cartesian formalism which suitably extends the definition of central and matter charges, as well as of black hole effective potential and first order "fake" superpotential, in order to deal with not necessarily axisimmetric solutions, and thus with multi-centered and/or (under-)rotating extremal black holes. We derive general first order flow equations for composite non-BPS and almost BPS classes, and we analyze some of their solutions, retrieving various single-centered (static or under-rotating) and multi-centered known systems. As in the t^3 model, the almost BPS class turns out to split into two general branches, and the well known almost BPS system is shown to be a particular solution of the second branch.

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