On the power spectrum generated during inflation

Understand

Recently there have been differing viewpoints on how to evaluate the curvature power spectrum generated during inflation.

• Since the primordial curvature power spectrum is the seed for structure formation and provides a link between observations and inflationary parameters, it is important to resolve any disagreements over the expression for the power spectrum.
• In this article we discuss these differing viewpoints and indicate issues that are relevant to both approaches.
• We then argue why the standard expression is valid.