Surface Terms of Quintic Quasitopological Gravity and Thermodynamics of Quasi-Topological Magnetic Brane Coupled to Nonlinear Electrodynamics

Thermodynamics of static solutions in (n+1)-dimensional Quintic Quasitopological gravity

Based on the fact that some important theories like string and M-theories predict spacetime with higher dimensions, so, in this paper, we aim to construct a theory of quintic quasitopological gravity in higher dimensions ($n\geq5$). This $(n+1)$-dimensional quintic quasitopological gravity can also lead to the most second-order linearized field equations in the spherically symmetric spacetimes. These equations can not be solved exactly and so, we obtain a new class of $(n+1)$-dimensional static solutions with numeric methods. For large values of mass parameter $m$, these solutions yield to bla…

与非线性电动力学相互作用的拟拓扑引力的瓦迪亚型解

Vaidya-Type Solutions of Quasitopological Gravity Interacting with Nonlinear Electrodynamics

该研究在任意时空维度构建拟拓扑引力与非线性电动力学耦合的瓦迪亚型解，从静态解出发，通过提升积分常数为坐标的任意函数得到动态解，表明包含特定通量可满足场方程，为生成精确辐射带电解提供简单系统方法。

带物质的拟拓扑引力：修正双副本方法

Quasitopological Gravity with Matter: Modified Double-Copy Approach

研究将修正双副本方法扩展到带物质的拟拓扑引力，通过映射场方程得到Kerr-Schild度规解，验证多种物质源的兼容性，在爱因斯坦极限下辅助非线性电动力学退化为麦克斯韦理论。

On four-dimensional Einsteinian gravity, quasitopological gravity, cosmology and black holes

We show that the combination of cubic invariants defining five-dimensional quasitopological gravity, when written in four dimensions, reduce to the version of four-dimensional Einsteinian gravity recently proposed by Arciniega, Edelstein & Jaime, that produces second order equations of motion in a FLRW ansatz, with a purely geometrical inflationary period. We introduce a quartic version of the four-dimensional Einsteinian theory with similar properties, and study its consequences. In particular we found that there exists a region on the space of parameters which allows for thermodynamically st…

带物质的准拓扑引力的修正双副本构造

Modified Double Copy for Quasitopological Gravity with Matter

研究将修正双副本构造扩展到带物质的准拓扑引力，利用辅助规范场方程解构造QTG场方程精确解，涵盖多类理论与解并重现爱因斯坦引力极限。

准拓扑引力与双重复制形式化

Quasitopological gravity and double-copy formalism

本文提出通过修改的双重复制构造，将准拓扑引力理论与非线性电动力学联系起来，推导出高维规则黑洞解，扩展了双重复制范式的应用范围。