Comparison of Einstein-Boltzmann solvers for testing general relativity
Comparison of Einstein-Boltzmann solvers for testing general relativity
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DOI：
10.1103/physrevd.97.023520
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发表时间：
2017-09
影响因子：
5
通讯作者：
E. Bellini;A. Barreira;N. Frusciante;Bin Hu;S. Peirone;M. Raveri;M. Zumalacárregui;A. Avilez-López;M. Ballardini;R. Battye;B. Bolliet;E. Calabrese;Yves Dirian;P. Ferreira;F. Finelli;Zhiqi Huang;M. Ivanov;J. Lesgourgues;Baojiu Li;N. A. Lima;F. Pace;D. Paoletti;I. Sawicki;A. Silvestri;C. Skordis;C. Umilta;F. Vernizzi
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文献类型：
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作者：
E. Bellini;A. Barreira;N. Frusciante;Bin Hu;S. Peirone;M. Raveri;M. Zumalacárregui;A. Avilez-López;M. Ballardini;R. Battye;B. Bolliet;E. Calabrese;Yves Dirian;P. Ferreira;F. Finelli;Zhiqi Huang;M. Ivanov;J. Lesgourgues;Baojiu Li;N. A. Lima;F. Pace;D. Paoletti;I. Sawicki;A. Silvestri;C. Skordis;C. Umilta;F. Vernizzi
我们比较了对广义相对论进行修改的爱因斯坦-玻尔兹曼求解器，发现对于各种模型和参数，它们都具有很高的精度。我们研究了三个主要模拟一般标量张量理论的通用代码、三个模拟 Jordan-Brans-Dicke (JBD) 重力的代码、一个模拟 f(R) 重力的代码、一个模拟协变伽利略的代码、一个模拟 Ho\v{r}ava-Lifschitz 重力的代码以及两个模拟非局部重力模型的代码。比较一系列不同模型的宇宙微波背景角功率谱和暗物质功率谱的预测，我们发现在百分之一的水平上一致。这意味着这套爱因斯坦-玻尔兹曼求解器现在对于宇宙学和引力参数的精度约束来说足够准确。
We compare Einstein-Boltzmann solvers that include modifications to General Relativity and find that, for a wide range of models and parameters, they agree to a high level of precision. We look at three general purpose codes that primarily model general scalar-tensor theories, three codes that model Jordan-Brans-Dicke (JBD) gravity, a code that models f(R) gravity, a code that models covariant Galileons, a code that models Ho\v{r}ava-Lifschitz gravity and two codes that model non-local models of gravity. Comparing predictions of the angular power spectrum of the cosmic microwave background and the power spectrum of dark matter for a suite of different models, we find agreement at the sub-percent level. This means that this suite of Einstein-Boltzmann solvers is now sufficiently accurate for precision constraints on cosmological and gravitational parameters.