Secondary graviton spectra, second-order correlations and Bose-Einstein enhancement
arXiv:1209.3991 · doi:10.1088/0264-9381/30/1/015009
Abstract
Primary graviton spectra, produced via stimulated emission from an initial Bose-Einstein distribution, are enhanced for typical scales larger than the redshifted thermal wavelength. A mixed state of phonons induces a secondary graviton spectrum which is hereunder computed in terms of three parameters (i.e. the number of phonon species, the tensor-to-scalar ratio and the thermal wavelengths of the mixture). The primary and secondary graviton spectra are shown to be sensitive, respectively, to the first-order and second-order correlation properties of the initial quantum mixture so that the semiclassical theory is argued to be generally inadequate in this context. For particular values of the parameters the secondary contribution may turn out to be comparable with the primary spectrum over large-scales.
25 pages, no figures
References in corpus (9)
- Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves
- High resolution CMB power spectrum from the complete ACBAR data set
- Non-gaussianities and the Stimulated creation of quanta in the inflationary universe
- Upper limit map of a background of gravitational waves
- Laser-interferometric Detectors for Gravitational Wave Background at 100 MHz : Detector Design and Sensitivity
- Enhanced polarization of CMB from thermal gravitational waves
- Hanbury Brown-Twiss interferometry and second-order correlations of inflaton quanta
- Energy Momentum Pseudo-Tensor of Relic Gravitational Wave in Expanding Universe
- Prospects for Stochastic Background Searches Using Virgo and LSC Interferometers