https://doi.org/10.1140/epjc/s10052-018-5733-0
Regular Article - Theoretical Physics
Running of the spectral index in deformed matter bounce scenarios with Hubble-rate-dependent dark energy
Department of Physics, Faculty of Science, Bu-Ali Sina University, Hamedan, 65178, Iran
* e-mail: khodam@basu.ac.ir
Received:
14
February
2018
Accepted:
11
March
2018
Published online:
21
March
2018
As a deformed matter bounce scenario with a dark energy component, we propose a deformed one with running vacuum model (RVM) in which the dark energy density 
is written as a power series of 
and 
with a constant equation of state parameter, same as the cosmological constant, 
. Our results in analytical and numerical point of views show that in some cases same as 
CDM bounce scenario, although the spectral index may achieve a good consistency with observations, a positive value of running of spectral index (
) is obtained which is not compatible with inflationary paradigm where it predicts a small negative value for . However, by extending the power series up to 
, 
, and estimating a set of consistent parameters, we obtain the spectral index 
, a small negative value of running and tensor to scalar ratio r, which these reveal a degeneracy between deformed matter bounce scenario with RVM-DE and inflationary cosmology.
© The Author(s), 2018
