Prospects for direct detection of primordial gravitational waves
| dc.creator | Chongchitnan, Sirichai | |
| dc.creator | Efstathiou, George | |
| dc.date | 2006-02-27 | |
| dc.date | 2006-04-08 | |
| dc.date.accessioned | 2026-07-07T07:00:53Z | |
| dc.date.available | 2026-07-07T07:00:53Z | |
| dc.description | We study the primordial gravitational wave background produced in models of single field inflation. Using the inflationary flow approach, we investigate the amplitude of gravitational wave spectrum in the frequency range 1 mHz - 1 Hz pertinent to future space-based laser interferometers. For models that satisfy the current observational constraint on the tensor-to-scalar ratio, r<0.36, we derive a strict upper bound of omega_{gw}<1.6 x 10^{-15}, independent of the form of the inflationary potential. Applying, in addition, the observational constraints on the spectral index and its running, omega_{gw} is expected to be considerably lower than this bound unless the shape of the potential is finely tuned. We contrast our numerical results with those based on simple power-law extrapolation of the tensor power spectrum from CMB scales. In addition to single field inflation, we summarise a number of other possible cosmological sources of primordial gravitational waves and assess what might be learnt from direct detection experiments such as LISA, Big Bang Observer and beyond. | |
| dc.description | 11 pages, 3 figures. Minor amendments. Accepted by Phys. Rev. D | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0602594 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0602594 | |
| dc.identifier | Phys.Rev. D73 (2006) 083511 | |
| dc.identifier | doi:10.1103/PhysRevD.73.083511 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/108115 | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Prospects for direct detection of primordial gravitational waves | |
| dc.type | text |