Effect of broad bounce on primordial gravitational waves

doi:10.7523/j.issn.2095-6134.2019.04.004

›› 2019, Vol. 36 ›› Issue (4): 461-466.DOI: 10.7523/j.issn.2095-6134.2019.04.004

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Effect of broad bounce on primordial gravitational waves

ZHAO Jinyun, PIAO Yunsong

School of Physics Sciences, University of Chinese Academy of Sciences, Beijing 101408, China

Received:2018-04-08 Revised:2018-04-28 Online:2019-07-15
Supported by:
Supported by the Special Fund of University of Chinese Academy of Sciences for Scientific Research Cooperation.

Abstract

Abstract: The bounce inflation is successful in solving the initial singularity problem of inflation and is also competitive in explaining the power deficit in CMB at large scale. Generally, the duration that the bounce lasts is short (the so-called narrow bounce). However, the case of broad bounce is not ruled out. In this study, we focus on the tensor perturbation during the inflation with a broad bounce. We find that the power spectrum may be very different from that in narrow bounce model.

Key words: bounce inflation, gravitational waves, power spectrum

CLC Number:

P142

ZHAO Jinyun, PIAO Yunsong. Effect of broad bounce on primordial gravitational waves[J]. , 2019, 36(4): 461-466.

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Effect of broad bounce on primordial gravitational waves

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