3+1 formulation of the standard model extension gravity sector
3+1 formulation of the standard model extension gravity sector
复制标题
DOI：
10.1103/physrevd.103.044010
复制
发表时间：
2020-09
影响因子：
5
通讯作者：
K. O’Neal-Ault;Q. Bailey;Nils A. Nilsson
中科院分区：
文献类型：
--
作者：
K. O’Neal-Ault;Q. Bailey;Nils A. Nilsson
我们提出了一个$3 + 1 $制定的有效场论框架，称为标准模型的引力部门的扩展。采用显式的局部洛伦兹和同态对称破缺假设，我们进行了Dirac-Hamilton分析。我们表明，结构的动力学提出了显着的差异，从广义相对论和其他修改的重力模型。我们探讨了汉密尔顿方程中某些特殊系数的选择。我们的主要应用是宇宙学，我们提出了这种情况下修改的弗里德曼方程。结果显示了对标准宇宙学的一些有趣的修改。此外，我们将我们的结果与现有的框架和模型进行比较，并评论对引力理论和现象学其他领域的潜在影响。
We present a $3+1$ formulation of the effective field theory framework called the standard model extension in the gravitational sector. The explicit local Lorentz and diffeomorphism symmetry breaking assumption is adopted, and we perform a Dirac-Hamiltonian analysis. We show that the structure of the dynamics presents significant differences from general relativity and other modified gravity models. We explore Hamilton's equations for some special choices of the coefficients. Our main application is cosmology, and we present the modified Friedmann equations for this case. The results show some intriguing modifications to standard cosmology. In addition, we compare our results to existing frameworks and models, and we comment on the potential impact to other areas of gravitational theory and phenomenology.