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arXiv 2201.10532gr-qchep-th
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具有动力挠率和非度量场的Plebaski-Demiaski解

Plebański-Demiański solutions with dynamical torsion and nonmetricity fields

Sebastian Bahamonde, Jorge Gigante Valcarcel, Laur Järv

摘要:

在度规-仿射引力规范理论的框架下,构造了具有两个膨胀和双主零方向的Plebaski-Demiaski定常解和轴对称解.本文从Podolskiy和Vrátnovel最近提出的宇宙学常数为零的度规的新改进形式出发,在存在宇宙学常数的情况下推广了这种形式,并导出了挠率张量和非度规张量的物理源在Weyl-Cartan几何中保持它的动力学贡献的条件.由此产生的黑洞配置的特点是质量,轨道角动量,加速度,NUT参数,宇宙学常数和电磁荷的黎曼部门的理论,以及由旋转和膨胀费用的扭转和nonmetricity字段。前者受到一个约束,代表一个去耦极限与负责轴对称的参数,超过该几何的时空预计将被纠正。

英文摘要:

We construct Plebański-Demiański stationary and axisymmetric solutions with two expanding and double principal null directions in the framework of Metric-Affine gauge theory of gravity. Starting from the new improved form of the metric with vanishing cosmological constant recently achieved by Podolský and Vrátný, we extend this form in the presence of a cosmological constant and derive the conditions under which the physical sources of the torsion and nonmetricity tensors provide dynamical contributions preserving it in Weyl-Cartan geometry. The resulting black hole configurations are characterised by the mass, orbital angular momentum, acceleration, NUT parameter, cosmological constant and electromagnetic charges of the Riemannian sector of the theory, as well as by the spin and dilation charges of the torsion and nonmetricity fields. The former is subject to a constraint representing a decoupling limit with the parameters responsible of axial symmetry, beyond which the geometry of the space-time is expected to be corrected.

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