Generation of gravitational waves in dynamical Chern-Simons gravity

Abstract

We investigate gravitational waves (GWs) generated in a two-field inflationary model with a non-canonical kinetic term, in which the gravitational Chern-Simons term is coupled to a heavy dynamical field. In such a model, primordial GWs experience a period of resonant amplification for some modes. In addition, isocurvature perturbations suffer from a temporary tachyonic instability due to an effective negative mass, which source curvature perturbations, resulting in large induced GWs. These two stochastic gravitational wave backgrounds correspond to different frequency bands, which are expected to be detected by future GW detectors such as SKA, LISA and Taiji.

References in corpus (17)

• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Gravitational-wave sensitivity curves
• Circular Polarization of Primordial Gravitational Waves in String-inspired Inflationary Cosmology
• Curvature and isocurvature perturbations in two-field inflation
• Generating PBHs and small-scale GWs in two-field models of inflation
• The Barbero-Immirzi Parameter as a Scalar Field: K-Inflation from Loop Quantum Gravity?
• The LISA-Taiji network
• Primordial black holes and gravitational waves from resonant amplification during inflation
• Testing gravitational parity violation with coincident gravitational waves and short gamma-ray bursts
• Barbero-Immirzi field in canonical formalism of pure gravity
• Spectrum of Primordial Gravitational Waves in Modified Gravities: A Short Overview
• Measuring Parity Violation in the Stochastic Gravitational Wave Background with the LISA-Taiji network
• Spectral Dependence of CMB Polarization and Parity
• Chirality of Gravitational Waves in Chern-Simons $f(R)$ Gravity Cosmology
• $CPT$ Violating Electrodynamics and Chern-Simons Modified Gravity
• Enhanced power on small scales and evolution of quantum state of perturbations in single and two field inflationary models
• Chirality oscillation of primordial gravitational waves during inflation

Cited by in corpus (11)

• Polarized primordial gravitational waves in spatial covariant gravities
• Generating enhanced parity-violating gravitational waves during inflation with violation of the null energy condition
• Parity-violation in bouncing cosmology
• Gravitational Waves in Chern-Simons-Gauss-Bonnet Gravity
• Polarized gravitational waves in the parity violating scalar-nonmetricity theory
• Alternative LISA-TAIJI networks: Detectability of the Parity Violation in Stochastic Gravitational Wave Background
• Parity-violating primordial gravitational waves from null energy condition violation
• Chiral Gravitational Wave Background from Audible Axion via Nieh-Yan Term
• Amplifying quantum discord during inflationary magnetogenesis through violation of parity
• Flattened bispectrum of the scalar-induced gravitational waves
• Bridging inflation and reheating: chiral gravitational waves from aHz to GHz