scholarly journals On the difficulty of generating gravitational wave turbulence in the early universe

2018 ◽  
Vol 35 (18) ◽  
pp. 187001 ◽  
Author(s):  
Katy Clough ◽  
Jens C Niemeyer
Keyword(s):  
Gravitational Wave ◽  
Early Universe ◽  
Wave Turbulence

scholarly journals Beginning of Universe through large field hybrid inflation

2015 ◽  
Vol 30 (21) ◽  
pp. 1550106 ◽  
Author(s):  
Tatsuo Kobayashi ◽  
Osamu Seto
Keyword(s):  
Gravitational Wave ◽  
Early Universe ◽  
High Energy ◽  
Wave Mode ◽  
Energy Scale ◽  
Large Field ◽  
Tensor Perturbation ◽  
Expectation Value ◽  
Hybrid Inflation ◽  
High Energy Scale

Recent detection of B-mode polarization induced from tensor perturbations by the BICEP2 experiment implies the so-called large field inflation, where an inflaton field takes super-Planckian expectation value during inflation, at a high energy scale. We show however, if another inflation follows hybrid inflation, the hybrid inflation can generate a large tensor perturbation with not super-Planckian but Planckian field value. This scenario would relax the tension between BICEP2 and Planck concerning the tensor-to-scalar ratio, because a negative large running can also be obtained for a certain number of e-fold of the hybrid inflation. A natural interpretation of a large gravitational wave mode with or without the scalar spectral running might be multiple inflation in the early Universe.

scholarly journals Measurement of parity violation in the early universe using gravitational-wave detectors

2013 ◽  
Vol 726 (1-3) ◽  
pp. 66-71 ◽  
Author(s):  
S.G. Crowder ◽  
R. Namba ◽  
V. Mandic ◽  
S. Mukohyama ◽  
M. Peloso
Keyword(s):  
Gravitational Wave ◽  
Early Universe ◽  
Parity Violation ◽  
Gravitational Wave Detectors

scholarly journals Detecting relics of a thermal gravitational wave background in the early Universe

2009 ◽  
Vol 680 (5) ◽  
pp. 411-416 ◽  
Author(s):  
Wen Zhao ◽  
Deepak Baskaran ◽  
Peter Coles
Keyword(s):  
Gravitational Wave ◽  
Early Universe ◽  
Gravitational Wave Background

scholarly journals The scalar, vector, and tensor modes in gravitational wave turbulence simulations

2021 ◽  
Author(s):  
Axel Brandenburg ◽  
Grigol Gogoberidze ◽  
Tina Kahniashvili ◽  
Sayan Mandal ◽  
Alberto Roper Pol ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Wave Turbulence

scholarly journals Nonlinear diffusion models for gravitational wave turbulence

2019 ◽  
Vol 390 ◽  
pp. 84-88 ◽  
Author(s):  
Sébastien Galtier ◽  
Sergey V. Nazarenko ◽  
Éric Buchlin ◽  
Simon Thalabard
Keyword(s):  
Gravitational Wave ◽  
Nonlinear Diffusion ◽  
Diffusion Models ◽  
Wave Turbulence
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