https://doi.org/10.1140/epjc/s10052-016-4554-2
Regular Article - Theoretical Physics
Towards the bounce inflationary gravitational wave
1
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
2
Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing, 100190, China
* e-mail: lihaiguang14@mails.ucas.ac.cn
Received:
23
October
2016
Accepted:
2
December
2016
Published online:
20
December
2016
In the bounce inflation scenario, the inflation is singularity-free, while the advantages of inflation are preserved. We analytically calculate the power spectrum of its primordial gravitational waves (GWs), and show a universal result including the physics of the bounce phase. The spectrum acquires a cutoff at large scale, while the oscillation around the cutoff scale is quite drastic, which is determined by the details of bounce. Our work highlights that the primordial GWs at large scale may encode the physics of the bounce ever happened at about 
efolds before inflation.
© The Author(s), 2016
