2016/08/31 by Yong Cai, Yutong Wang, Yu-Tong Wang +1 · 1 citation
Physics and Astronomy · #Amplitude #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cosmic microwave background #Cosmology and Gravitation Theories #Gravitation #Gravitational wave #Inflation (cosmology) #Oscillation (cell signaling) #Physics #Polarization (electrochemistry) #Pulsars and Gravitational Waves Research #Quantum electrodynamics #Quantum mechanics #Scalar (mathematics) #Scalar field #Theoretical physics #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1007/jhep03(2017)024
published as JHEP03(2017)024 · 14 pages, 11 figures; published version in JHEP; one figure added; references and comments added
openalex publication_date 2017/03/01 · arxiv created 2017/03/07 · arxiv updated 2017/03/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that if the gravitational Chern-Simons term couples to a massive scalar field (m > H), the primordial gravitational waves (GWs) will show itself the chirality oscillation, i.e., the amplitudes of the left- and right-handed GWs modes will convert into each other and oscillate in their propagations. This oscillation will eventually develop a permanent difference of the amplitudes of both modes, which leads to nearly opposite oscillating shapes in the power spectra of the left- and right-handed primordial GWs. We discuss its implication to the CMB B-mode polarization.