标题： 显式时空对称性破缺和原初场的动力学 显示英文标题

标题： Explicit spacetime-symmetry breaking and the dynamics of primordial fields

摘要： 我们使用一个描述洛伦兹/CPT破坏的有效场论来研究显式时空对称性破缺对原初张量扰动的影响。 我们发现，当洛伦兹破坏的系数足够小时，我们的解与广义相对论的解非常接近；值得注意的是，我们发现为了使这种方法在辐射主导期间有效，必须要求洛伦兹破坏的系数不超过$T_{CMB}/(1K) 10^{-9}$。 我们还发现了一个与该系数相关的间接约束，当要求子霍金模式必须振荡时，该约束与标度因子有关。 显示英文摘要

摘要： We study the effects of explicit spacetime-symmetry breaking on primordial tensor fluctuations using an effective-field theory for Lorentz/CPT violation. We find that for a sufficiently small coefficient for Lorentz violation, our solutions track the GR solutions very closely; remarkably, we find that for this approach to be valid during radiation domination, we must impose that the coefficient for Lorentz violation is no larger than $T_{CMB}/(1K) 10^{-9}$. We also find an indirect constraint on the same coefficient related to the scale factor when demanding that the subhorizon modes must oscillate.