Signatures of short distance physics in the cosmic microwave background
Signatures of short distance physics in the cosmic microwave background
We systematically investigate the effect of short distance physics on the spectrum of temperature anisotropies in the cosmic microwave background produced during inflation. We present a general argument---assuming only low-energy locality---that the size of such effects is of order ${H}^{2}{/M}^{2},$ where H is the Hubble parameter during inflation and M …