Gravitational wave generation in loop quantum cosmology
arXiv:1108.0079 · doi:10.1103/PhysRevD.85.024034
Abstract
We calculate the full spectrum, as observed today, of the cosmological gravitational waves generated within a model based on loop quantum cosmology. It is assumed that the universe, after the transition to the classical regime, undergoes a period of inflation driven by a scalar field with a chaotic-type potential. Our analysis shows that, for certain conditions, loop quantum effects leave a clear signature on the spectrum, namely, an over-production of low-frequency gravitational waves. One of the aims of our work is to show that loop quantum cosmology models can be tested and that, more generally, pre-inflationary physical processes, contrary to what is usually assumed, leave their imprint in those spectra and can also be tested.
7 pages, 8 figures, revtex4
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- Modifications to Gravitational Wave Equation from Canonical Quantum Gravity
- The energy spectrum of gravitational waves in a loop quantum cosmological model
- Gravitational waves from two scalar fields unifying the dark sector with inflation
- Gravitational waves from warm inflation in the weak dissipative regime