Probing the primordial universe with gravitational waves detectors

Abstract

The spectrum of primordial gravitational waves (GWs), especially its tilt $n_T$, carries significant information about the primordial universe. Combining recent aLIGO and Planck2015+BK14 data, we find that the current limit is $n_T=0.016_{-0.989}^{+0.614}$ at 95% C.L. We also estimate the impacts of Einstein Telescope and LISA on constraining $n_T$. Moreover, based on the effective field theory of cosmological perturbations, we make an attempt to confront some models of early universe scenarios, which produce blue-tilted GWs spectrum ($n_T>0$), with the corresponding datasets.

17 pages, 5 figures, 2 tables; published version, a new subsection and many references added

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Cited by in corpus (8)

• Pulsar timing array observations as possible hints for nonsingular cosmology
• Null energy condition violation during inflation and pulsar timing array observations
• Higher-Curvature Corrections and Tensor Modes
• Perturbative unitarity and NEC violation in genesis cosmology
• Primordial Gravitational Waves Assisted by Cosmological Scalar Perturbations
• Scalar induced gravitational waves review
• Climbing over the potential barrier during inflation via null energy condition violation
• Stochastic gravitational wave background from the collisions of dark matter halos