35 citations · 82 across the 3 of their papers we have counts for
3 papers
astro-ph.CO2016★ 25 cited
Chirality oscillation of primordial gravitational waves during inflation
Yong Cai, Yu-Tong Wang, Yun-Song Piao
We show that if the gravitational Chern-Simons term couples to a massive scalar field (), the primordial gravitational waves (GWs) will show itself the chirality oscillation,…
astro-ph.CO2015★ 22 cited
Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves
Yong Cai, Yu-Tong Wang, Yun-Song Piao
In low-energy effective string theory and modified gravity theories, the propagating speed of primordial gravitational waves may deviate from unity. We find that the step-lik…
astro-ph.CO2015★ 35 cited
Pre-inflationary primordial perturbations
Yong Cai, Yu-Tong Wang, Yun-Song Piao
The large-scale power deficit in the cosmic microwave background fluctuations might be relevant with the physics of pre-inflation, a bounce, or a superinflationary phase preceding…