Holography, diffeomorphisms, and scaling violations in the CMB

@article{Larsen2004HolographyDA,
  title={Holography, diffeomorphisms, and scaling violations in the CMB},
  author={Finn Larsen and Robert A. McNees},
  journal={Journal of High Energy Physics},
  year={2004},
  volume={2004},
  pages={062-062}
}
We analyze diffeomorphism invariance in inflationary spacetimes regulated by a boundary at late time. We present the action for quadratic fluctuations in the presence of a boundary, and verify that it is gauge invariant precisely when the correct local counterterms are included. The scaling behavior of bulk correlation functions at the boundary is determined by Callan-Symanzik equations which predict scaling violations in agreement with the standard inflationary predictions for spectral indices… 
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