Title: Anisotropic cubic curvature couplings Show Chinese title

Title: 各向异性立方曲率耦合

Abstract: To complement recent work on tests of spacetime symmetry in gravity, cubic curvature couplings are studied using an effective field theory description of spacetime-symmetry breaking. The associated mass dimension 8 coefficients for Lorentz violation studied do not result in any linearized gravity modifications and instead are revealed in the first nonlinear terms in an expansion of spacetime around a flat background. We consider effects on gravitational radiation through the energy loss of a binary system and we study two-body orbital perturbations using the post-Newtonian metric. Some effects depend on the internal structure of the source and test bodies, thereby breaking the Weak Equivalence Principle for self-gravitating bodies. These coefficients can be measured in solar-system tests, while binary-pulsar systems and short-range gravity tests are particularly sensitive. Show Chinese abstract

Abstract: 为了补充近期在引力中对时空对称性检验的工作，使用了时空对称性破缺的有效场论描述来研究三次曲率耦合。 对于研究的洛伦兹破坏的维度8系数，不会导致线性化引力的修改，而是在围绕平直背景的时空展开中的第一个非线性项中显现出来。 我们考虑通过双星系统的能量损失对引力辐射的影响，并使用后牛顿度规研究双体轨道扰动。 一些影响取决于源体和测试物体的内部结构，从而破坏自引力物体的弱等效原理。 这些系数可以在太阳系测试中测量，而双脉冲星系统和短程引力测试尤其敏感。