论文标题
在GWTC-3的重力传播中搜索各向异性，双重时期的时空对称性破裂
Search for anisotropic, birefringent spacetime-symmetry breaking in gravitational wave propagation from GWTC-3
论文作者
论文摘要
有效的现场理论框架，标准模型扩展，用于研究重力波传播过程中Lorentz和CPT侵入效应的存在。我们实施了一个修饰方程，以用于分散重力波，其中包括各向同性，各向异性和双向反射分散。使用Ligo-Virgo-Kagra算法库套件，我们对时空对称性破坏的源参数和系数进行了联合贝叶斯推断。从在GWTC-3目录中选出的45个高置信度事件的样本中，我们获得了$ 3.19 \ times 10^{ - 15} $ 〜m的最大限制，用于90 \％ci，用于同位素系数$ k _ {（v）00}^{（5）^{（5）} $ zere nisistropic coeffient ne anis coeffient。所有色散参数的组合测量结果可在16 $ k _ {（v）ij}^{（5）} $系数的16 $ k _ {（v）$ 10^{ - 13} $ 〜m的顺序上限制。我们通过比较与不同的波形模型获得的约束来研究推论的鲁棒性，并发现模拟波形中缺乏物理性可能是时空对称性破坏诱导的事件的分散体。
An effective field theory framework, the Standard-Model Extension, is used to investigate the existence of Lorentz and CPT-violating effects during gravitational wave propagation. We implement a modified equation for the dispersion of gravitational waves, that includes isotropic, anisotropic and birefringent dispersion. Using the LIGO-Virgo-KAGRA algorithm library suite, we perform a joint Bayesian inference of the source parameters and coefficients for spacetime symmetry breaking. From a sample of 45 high confidence events selected in the GWTC-3 catalog, we obtain a maximal bound of $3.19 \times 10^{-15}$~m at 90\% CI for the isotropic coefficient $k_{(V)00}^{(5)}$ when assuming the anisotropic coefficients to be zero. The combined measurement of all the dispersion parameters yields limits on the order of $10^{-13}$~m for the 16 $k_{(V)ij}^{(5)}$ coefficients. We study the robustness of our inference by comparing the constraints obtained with different waveform models, and find that a lack of physics in the simulated waveform may appear as spacetime symmetry breaking-induced dispersion for a subset of events.
