论文标题
从动力学质量到通货膨胀情景的非标准原始时钟
Non-Standard Primordial Clocks from Dynamical Mass in Alternative to Inflation Scenarios
论文作者
论文摘要
在原始宇宙中，重场的振荡可以视为衡量宇宙扩张或收缩历史的标准时钟。这些标准时钟提供了独立于模型的通货膨胀和替代方案的方式。但是，重场的质量可能不是一个恒定的质量，而是通过与RICCI标量或自我相互作用的非最小耦合动态产生的质量。在动态产生的质量的情况下，重场的质量通常是哈勃有序的，因此在替代通货膨胀情景的替代方面是时间依赖的。我们表明，这种动态生成的质量项可以被视为替代通货膨胀的非标准原始时钟，提供了与通货膨胀的标准时钟相似的振荡频率。有关比例依赖性的其他信息可以将这种非标准时钟与标准时钟区分开。
In the primordial universe, oscillations of heavy fields can be considered as standard clocks to measure the expansion or contraction history of the universe. Those standard clocks provide a model-independent way of distinguishing inflation and alternative scenarios. However, the mass of the heavy fields may not be a constant mass, but rather mass dynamically generated by non-minimal coupling to the Ricci scalar, or self-interactions. In the case of dynamically generated mass, the mass of the heavy field is generically of order Hubble, and thus is time-dependent in alternative to inflation scenarios. We show that such dynamically generated mass terms can be considered as non-standard primordial clocks for alternative to inflation, providing similar oscillatory frequencies as standard clocks of inflation. Additional information on scale dependence can distinguish such non-standard clocks from standard clocks.
