论文标题
显式时空对称性断裂和原始场的动力学
Explicit spacetime-symmetry breaking and the dynamics of primordial fields
论文作者
论文摘要
我们研究了使用有效的场理论违反洛伦兹/CPT的有效场理论，研究了显式时空对称性破坏对原始张量波动的影响。我们发现重力仍然是无质量的，但是张量模式的传播速度已修改，并且我们从最新的重力速度测量的$ 10^{ - 15} $上确定对称性破裂的系数限制。由于对称性的破坏，对脱水阶段进行了修改，在此通货膨胀时期，功率谱假设围绕一般余量极限的振荡缓慢。此外，我们发现原始张量功率谱保留了其规模不变性，但幅度已修改。我们还发现，在辐射统治期间变成亚渡轮的模式获得了与洛伦兹违规系数成正比的相移。
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 the graviton is still massless, but that the propagation speed of tensor modes is modified, and we obtain a constraint on the coefficient determining the symmetry breaking on the order of $10^{-15}$ from the recent measurements of the speed of gravity. Due to the symmetry breaking, the de-Sitter phase is modified, and during this inflationary epoch, the power spectrum assumes a slow oscillation around the general-relativity limit; further, we find that the primordial tensor power spectrum retains its scale invariance, but that the amplitude is modified. We also find that the modes which become subhorizon during radiation domination acquire a phase shift proportional to the coefficient for Lorentz violation.
