2021/07/09 by Wei Cheng, W. S. Cheng, Tao Qian +5
Physics and Astronomy · #Astrophysics #Axion #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Gravitational wave #Inflation (cosmology) #Lambda #Omega #Particle (ecology) #Particle physics #Physics #Quantum mechanics #astro-ph.CO #astro-ph.HE #hep-ph
paper · pdf · doi:10.1103/physrevd.104.103502
7 pages, 5 figures
arxiv created 2021/07/09 · openalex publication_date 2021/11/08 · arxiv updated 2021/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper, we investigate gravitational waves (GWs) from the axionlike particle inflation by applying the multinature inflation model. The model parameter n determines the exit way of inflation, the number of phase transitions (PTs), and the number of multiples of inflation. In the inflation exit with PTs, there is a lower bound for parameter n to reach the corresponding multiples of inflation, but the magnitude of n is negligible for the physical observations, such as ns, r, and \mathrm\ensuremathΩGWh2. GWs can be generated in two ways for the inflation exit with PTs, one derives from quantum fluctuations, which dominate the low-frequency regions, and these GWs can be detected by the Ultimate-Decigo detector at around 10^\ensuremath-1 Hz. However, the other one derives from PTs, which dominate the high-frequency regions, and it is expected to be detected by the future higher-sensitivity 3DSR GW detector.