arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.14673gr-qc
收藏

反对称张量场暴胀产生的引力波

Gravitational waves from inflation with antisymmetric tensor field

Sandeep Aashish, Abhilash Padhy, Sukanta Panda

摘要:

我们建立在过去对秩为2的反对称张量场的暴胀研究的基础上,包括对度规的张量扰动。我们进行了全面的分析,我们的模型在存在非最小耦合曲率项$R$和$R_{μν}$的背景动力学。找到了满足引力波传播速度约束的非最小耦合参数的适当条件。包括张量扰动,该模型被发现是免费的鬼不稳定性与最小的参数约束。我们还研究了引力波的演化,计算了功率谱和张量谱指数。

英文摘要:

We build upon the past studies of inflation with rank-2 antisymmetric tensor field, including here the tensor perturbations to metric. We perform a comprehensive analysis of the background dynamics of our model in the presence of non-minimal coupling curvature terms $R$ and $R_{μν}$. We find appropriate conditions on the nonminimal coupling parameters to satisfy the constraint of speed of propagation of gravitational waves. Including the tensor perturbations, the model is found to be free from ghost instabilities with minimal constraints on the parameters. We also study the evolution of gravitational waves, calculate the power spectrum and the tensor spectral index.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑