Chiral Primordial Gravitational Waves from a Lifshitz Point
arXiv:0904.0554 · doi:10.1103/PhysRevLett.102.231301
Abstract
We study primordial gravitational waves produced during inflation in quantum gravity at a Lifshitz point proposed by Hoava. Assuming power-counting renormalizability, foliation preserving diffeomorphism invariance, and the condition of detailed balance, we show that primordial gravitational waves are circularly polarized due to parity violation. The chirality of primordial gravitational waves is a quite robust prediction of quantum gravity at a Lifshitz point which can be tested through observations of cosmic microwave background radiation and stochastic gravitational waves.
4 pages,2 figures;v2:reference added; v3:reference added
References in corpus (4)
Cited by in corpus (18)
- Horava-Lifshitz Cosmology
- Strong coupling in Horava gravity
- Solutions to Horava Gravity
- Cosmology of the Lifshitz universe
- Thermodynamics of Black Holes in Horava-Lifshitz Gravity
- The Black Hole and Cosmological Solutions in IR modified Horava Gravity
- On the z=4 Horava-Lifshitz Gravity
- Towards constraining of the Horava-Lifshitz gravities
- Testing Hořava-Lifshitz gravity using thin accretion disk properties
- Dynamical Scalar Degree of Freedom in Horava-Lifshitz Gravity
- Caustic avoidance in Horava-Lifshitz gravity
- On IR solutions in Horava gravity theories
- Anisotropic Cosmology and (Super)Stiff Matter in Hořava's Gravity Theory
- Generalized uncertainty principle and Hořava-Lifshitz gravity
- Breaking the scale invariance of the primordial power spectrum in Horava-Lifshitz Cosmology
- Strong Coupling Quantum Einstein Gravity at a z=2 Lifshitz Point
- A Note on Quasi-Riemannian Gravity with Higher Derivatives
- Power spectra of scalar and tensor modes in modified Horava-Lifshitz gravity