标题： 暴胀期间无质量最小耦合标量的量子校正幂谱：Yukawa耦合与四次自相互作用的影响 显示英文标题

标题： Quantum corrected power spectra of massless minimally coupled scalars during inflation: Effects of Yukawa coupling versus quartic self-interaction

摘要： 我们首先研究了一个无质量的最小耦合标量场，在膨胀时空的局域de Sitter背景下，该标量场与一个无质量的Dirac费米子通过Yukawa相互作用耦合。 我们计算了该标量场的一圈修正模函数、功率谱、谱指数以及谱指数的变化率。 我们发现谱指数略微向蓝倾；因此，涨落幅度随着尺度变小而略有增加。 然后在第二部分，我们将第一部分中使用的方法应用于相同背景下的无质量最小耦合标量场，并且得到了具有四次自相互作用的标量场在一阶中的相关量的精确解析表达式。 与Yukawa标量不同，在这种情况下谱指数略微向红倾；因此，涨落幅度随着尺度变大而略有增加。 显示英文摘要

摘要： We, in the first part, contemplate a massless minimally coupled scalar which is Yukawa-coupled to a massless Dirac fermion in a locally de Sitter background of an inflating spacetime. We compute the scalar's quantum corrected mode function, power spectrum, spectral index and the running of the spectral index at one-loop order. We find that the spectrum is slightly blue-tilted; hence, the amplitudes of fluctuations grow slightly toward the smaller scales. Then, in the second part, we apply the computation method used in the first part to a massless minimally coupled scalar with a quartic self-interaction in the same background and obtain exact analytic expressions for the associated quantities at one-loop order. In contrast to the Yukawa scalar, the spectrum in this case is slightly red-tilted; hence, the amplitudes of fluctuations grow slightly toward the larger scales.