1.1k citations · 3.1k across the 54 of their papers we have counts for
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hep-th2013★ 10 cited
Coupling structure of multi-field primordial perturbations
Xian Gao
We investigate the coupling relations among perturbations in general multi-field models. We derived the equations of motion for both background and perturbations in a general basis…
hep-th2013★ 46 cited
Oscillatory features in the curvature power spectrum after a sudden turn of the inflationary trajectory
Xian Gao, David Langlois, Shuntaro Mizuno
In the context of two-field inflation characterized by a light direction and a heavy direction, we revisit the question of the impact of the massive modes on the power spectrum pro…
astro-ph.CO2013★ 114 cited
Towards Anisotropy-Free and Non-Singular Bounce Cosmology with Scale-invariant Perturbations
Taotao Qiu, Xian Gao, Emmanuel N. Saridakis
We investigate non-singular bounce realizations in the framework of ghost-free generalized Galileon cosmology, which furthermore can be free of the anisotropy problem. Considering…