论文标题
通货膨胀的不均匀初始条件：一条胜利的时光漫步路径
Inhomogeneous initial conditions for inflation: A wibbly-wobbly timey-wimey path to salvation
论文作者
论文摘要
我们使用数值相对论的3+1形式主义来研究Starobinsky和Higgs膨胀对不均匀初始条件的鲁棒性，这是场梯度或动能能量密度的形式。梯度和动能能量之间振荡阶段后，亚之间和哈勃大小的波动通常导致通货膨胀。哈勃大小的不均匀性还会产生可能最终形成原始黑洞的合同区域，随后被通货膨胀稀释。我们分析了通货膨胀时代的动力学以及向量和张量波动的产生。我们的分析进一步支持了通货膨胀对任何不均匀性，现场，速度或状态方程的鲁棒性。在较大的场值下，通货膨胀动力学仅略微取决于场电位，并且可以预期这种行为是普遍的，并且适用于高原型的任何通货膨胀潜力，而普兰克之后的CMB观察值则支持。
We use the 3+1 formalism of numerical relativity to investigate the robustness of Starobinsky and Higgs inflation to inhomogeneous initial conditions, in the form of either field gradient or kinetic energy density. Sub-Hubble and Hubble-sized fluctuations generically lead to inflation after an oscillatory phase between gradient and kinetic energies. Hubble-sized inhomogeneities also produce contracting regions that may end up forming primordial black holes, subsequently diluted by inflation. We analyse the dynamics of the preinflation era and the generation of vector and tensor fluctuations. Our analysis further supports the robustness of inflation to any size of inhomogeneity, in the field, velocity or equation of state. At large field values, the preinflation dynamics only marginally depends on the field potential and it is expected that such behaviour is universal and applies to any inflation potential of plateau-type, favoured by CMB observations after Planck.
