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arXiv 2005.12396hep-th
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Born-Infeld理论中由类点电荷解的双拷贝得到的广义Schwarzschild度规

Generalised Schwarzschild metric from double copy of point-like charge solution in Born-Infeld theory

Oscar Pasarin, Arkady A. Tseytlin

摘要:

我们讨论了可能的应用经典的双拷贝过程的建设推广的史瓦西度规从一个$α'$校正开弦模拟库仑解决方案。后者是近似的波恩-因菲尔德作用,这代表了一个开放的字符串有效作用的阿贝尔向量场的极限时,磁场强度的导数很小的点状电荷的解决方案。Born-Infeld解有一个规则的电场,在原点附近是恒定的,这表明开弦有效作用量中导数项的修正在那里可能很小。由Born-Infeld解的双拷贝构造得到的Schwarschild度量的推广看起来是非奇异的,但相应的曲率不变量仍然在$r=0$处爆炸。我们讨论了这种奇异性的起源,并评论可能的概括。

英文摘要:

We discuss possible application of classical double copy procedure to construction of a generalisation of the Schwarzschild metric starting from an $α'$-corrected open string analogue of Coulomb solution. The latter is approximated by a point-like charge solution of the Born-Infeld action, which represents the open string effective action for an abelian vector field in the limit when derivatives of the field strength are small. The Born-Infeld solution has a regular electric field which is constant near the origin, suggesting that corrections from derivative terms in the open string effective action may be small there. The generalization of the Schwarschild metric obtained by the double copy construction from the Born-Infeld solution looks non-singular but the corresponding curvature invariants still blow up at $r=0$. We discuss the origin of this singularity and comment on possible generalisations.

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