arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0707.1464hep-th
收藏

Gauss-Bonnet引力中的吸引子机制

The Attractor Mechanism in Gauss-Bonnet Gravity

Mohamed M. Anber, David Kastor

摘要:

研究了D=5 Gauss-Bonnet引力场耦合到规范场和标量场系统的黑洞解的极值问题。正如在爱因斯坦引力中一样,我们发现视界上的标量场的值必须使依赖于黑洞电荷的某个有效势取极值。如果矩阵的二阶导数的有效潜力在这个极值具有积极的特征值,我们给出的证据,近地平线微扰扩展的基础上,吸引机制继续持有在这类一般的理论。我们数值构造一个特定的简单的单标量场模型的解决方案,显示吸引机制在很宽的范围内的渐近值的标量场。我们还数值构造了非极值解,并表明吸引子机制未能保持远离极值。

英文摘要:

We study extremal black hole solutions of D=5 Gauss-Bonnet gravity coupled to a system of gauge and scalar fields. As in Einstein gravity, we find that the values of the scalar fields on the horizon must extremize a certain effective potential that depends on the black hole charges. If the matrix of second derivatives of the effective potential at this extremum has positive eigenvalues, we give evidence, based on a near horizon perturbative expansion, that the attractor mechanism continues to hold in this general class of theories. We numerically construct solutions to a particular simple single scalar field model that display the attractor mechanism over a wide range of asymptotic values for the scalar field. We also numerically construct non-extremal solutions and show that the attractor mechanism fails to hold away from extremality.

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。

↑