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arXiv · 2512.19207

Static plane symmetric solutions in $f(Q)$ gravity

Jun-Qin Long·Rui-Hui Lin·Xiang-Hua Zhai
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Abstract

We systematically investigate static plane symmetric configurations in $f(Q)$ gravity. For vacuum regions, we discuss the constancy of the nonmetricity scalar $Q$ and derive general vacuum solutions, which correspond effectively to Taub-(anti) de Sitter spacetimes with a cosmological constant determined by the specific $f(Q)$ model. By matching a singular thin shell source to the vacuum solutions, we relate the shell's energy density and pressure to the integration constants of the exterior geometry. We also examine a finite-thickness slab as another matter source supporting the vacuum solution. Through numerical analysis of a quadratic model $f(Q)=Q+\alpha Q^2$ with isotropic matter, we show that the maximum pressure inside the slab generally does not coincide with the geometric center. Moreover, a negative $\alpha$ with larger magnitude leads to higher internal pressure and a thicker slab, while models with positive $\alpha$ are incompatible with a self-gravitating slab of positive pressure.

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Jun-Qin Long, Rui-Hui Lin, Xiang-Hua Zhai. 2025-12-22. Static plane symmetric solutions in $f(Q)$ gravity. https://doi.org/10.1140/epjc%2Fs10052-026-15516-3

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