Gravitational Waves from Big Bang: Amplification of Vacuum Fluctuations by Inflation (by Kip Thorne)
A. Basic idea: same as parametric amplification of classical waves
B. Mathematical details
- Background cosmological metric
- Geometric optics propagation of GW's at "late times'
- Wave equation for GW's at all times
- Frozen and decaying solutions when wavelength is much larger than background radius of curvature
- Matching solutions together: resulting wave amplification