Gravitational wave non-Gaussianity from trans-Planckian quantum noise
Copyright policy )Gravitational wave non-Gaussianity from trans-Planckian quantum noise
Abstract We examine the effect of a trans-Planckian phase on the dynamics of inflationary tensor perturbations. To remedy the fact that this regime is not fully captured by standard perturbation theory, we introduce an effective quantum noise source, whose role is regulated by the energy scale Λ. The presence of the source modifies the initial conditions for the tensor modes, leaving a distinct imprint. We study the amplitude and shape of the gravitational wave bispectrum of the model and compare these with their counterparts obtained under the assumptions of Bunch-Davies initial conditions and α-vacua states. Depending on the value of the scale Λ, we find distinctive signatures associated with both the bispectrum shape and the non-linear parameter f NL.
- University of Portsmouth United Kingdom
- Spanish National Research Council Spain
- National Institute for Nuclear Physics Italy
- University Federico II of Naples Italy
- Institute for Theoretical Physics Spain
High Energy Physics - Theory, Cosmology and Nongalactic Astrophysics (astro-ph.CO), primordial gravitational waves, FOS: Physical sciences, gravitational wave bispectrum, trans-Planckian regime, General Relativity and Quantum Cosmology (gr-qc), Inflation, General Relativity and Quantum Cosmology, Gravitational waves, High Energy Physics - Theory (hep-th), Cosmological perturbation theory in GR and beyond, cosmological perturbation theory, Transplanckian physics, primordial gravitational waves (theory), Quantization of the gravitational field, inflation, Cosmological perturbation theory in GR and beyond; inflation; primordial gravitational waves (theory); transplanckian physics, Primordial gravitational waves (theory), transplanckian physics, Relativistic cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory, Cosmology and Nongalactic Astrophysics (astro-ph.CO), primordial gravitational waves, FOS: Physical sciences, gravitational wave bispectrum, trans-Planckian regime, General Relativity and Quantum Cosmology (gr-qc), Inflation, General Relativity and Quantum Cosmology, Gravitational waves, High Energy Physics - Theory (hep-th), Cosmological perturbation theory in GR and beyond, cosmological perturbation theory, Transplanckian physics, primordial gravitational waves (theory), Quantization of the gravitational field, inflation, Cosmological perturbation theory in GR and beyond; inflation; primordial gravitational waves (theory); transplanckian physics, Primordial gravitational waves (theory), transplanckian physics, Relativistic cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics
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