标题： 识别暴胀子与原初引力波 显示英文标题

标题： Identifying the inflaton with primordial gravitational waves

摘要： 我们探讨实验物理在揭示描述暴胀的引力拉格朗日量潜在结构方面的能力。 虽然暴胀参数空间的可观测退化较大，但未来对可观测值的测量，如非高斯性或等曲率模式，超出绝热和张量两点函数，可能会减少这种退化。 我们表明，即使没有这些可观测值，通过精确测量张量谱指数，可能像原初引力波的直接探测那样，可以缩小可能的标量势范围。 显示英文摘要

摘要： We explore the ability of experimental physics to uncover the underlying structure of the gravitational Lagrangian describing inflation. While the observable degeneracy of the inflationary parameter space is large, future measurements of observables beyond the adiabatic and tensor two-point functions, such as non-Gaussianity or isocurvature modes, might reduce this degeneracy. We show that even in the absence of such observables, the range of possible inflaton potentials can be reduced with a precision measurement of the tensor spectral index, as might be possible with a direct detection of primordial gravitational waves.