Parity violation in pre-inflationary bounce

2014/09/30 by Yutong Wang, Yu-Tong Wang, Yun-Song Piao · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cosmic microwave background #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Gravitation #Gravitational wave #Parity (physics) #Particle physics #Physics #Quantum electrodynamics #Quantum mechanics #astro-ph.CO #gr-qc #hep-th

paper · pdf · doi:10.1016/j.physletb.2014.12.011

15 pages, 4 figures,the final version

openalex publication_date 2014/12/10 · arxiv created 2014/12/11 · arxiv updated 2018/05/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The power suppression on large scale in the CMB TT-mode power spectrum might imply the occurrence of a pre-inflationary bounce. We calculate the circularly polarized gravitational wave, leaded by the gravitational Chern–Simons term universally appearing in particle physics and string theory, in the inflation model with the pre-inflationary bounce. The circularly polarized gravitational wave will induce TB- and EB-mode correlations at CMB last scatting surface. We find that if the pre-inflationary bounce actually occurs, the TB- and EB-mode correlations on large scale will be enhanced, while the BB-mode correlation on corresponding scales is suppressed.

Citations

• Suppressing the lower multipoles in the CMB anisotropies
• Signature of Gravity Waves in the Polarization of the Microwave Background
• Proliferation in cycle
• Possible explanation to a low CMB quadrupole
• Birefringent gravitational waves and the consistency check of inflation
• Chern-Simons Modified General Relativity
• The pre-big bang scenario in string cosmology

Cited by

• Chirality oscillation of primordial gravitational waves during inflation
• The bouncing cosmology with F(R) gravity and its reconstructing