Speaker
Taotao Qiu
(Huazhong University of Science and Technology)
Description
Recent pulsar timing array (PTA) experiments have reported strong evidence of the stochastic gravitational wave background (SGWB). If interpreted as primordial gravitational waves, the signal favors a strongly blue-tilted spectrum. On the other hand, the Ekpyrosis-bouncing cosmology with a strongly blue-tilted gravitational wave spectrum, i.e., nT ≃ 2, offers a potential explanation for the observed SGWB signal. In this poster, we show that Ekpyrosis-bouncing model is capable to intepret the PTA result without pathologies. Moreover, the scalar perturbations also fit the constraints from the current observations.
| Research Area | Cosmology |
|---|
Author
Taotao Qiu
(Huazhong University of Science and Technology)