Cosmological Density Perturbations from a Quantum Gravitational Model of Inflation
✍ Scribed by L.R. Abramo; R.P. Woodard; N.C. Tsamis
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 194 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0015-8208
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✦ Synopsis
We derive the implications for anisotropies in the cosmic microwave background following from a model of inflation in which a bare cosmological constant is gradually screened by an infrared process in quantum gravity. The model predicts that the amplitude of scalar perturbations is A S 2X0 AE 0X2 Á 10 À5 , that the tensor-to-scalar ratio is r % 1X7 Á 10 À3 , and that the scalar and tensor spectral indices are n % 0X97 and n T % À2X8 Á 10 À4 , respectively. By comparing the model's power spectrum with the COBE 4-year RMS quadrupole, the mass scale of inflation is determined to be M 0X72 AE 0X03 Á 10 16 GeV. At this scale the model produces about 10 8 e-foldings of inflation, so another prediction is W 1.