TY - JOUR
T1 - Phantom solution in a non-linear Israel–Stewart theory
AU - Cruz, Miguel
AU - Cruz, Norman
AU - Lepe, Samuel
N1 - Funding Information:
N. C. acknowledges the hospitality of the Facultad de F?sica of Universidad Veracruzana, M?xico, where part of this work was done. This work has been supported by CONACyT-M?xico through the grant Repatriaciones, 2015, cuarta fase and SNI (M. C.) and N. C. and S. L. acknowledge the support of following Chilean Institutions: CONICYT, through the Fondecyt grant No. 1140238 (N. C.) and Pontificia Universidad Cat?lica de Valpara?so, Chile, through the VRIEA-DI-PUCV grant No. 039.351/2016 (S. L.).
Publisher Copyright:
© 2017 The Authors
PY - 2017/6/10
Y1 - 2017/6/10
N2 - In this paper we present a phantom solution with a big rip singularity in a non-linear regime of the Israel–Stewart formalism. In this framework it is possible to extend this causal formalism in order to describe accelerated expansion, where assumption of near equilibrium is no longer valid. We assume a flat universe filled with a single viscous fluid ruled by a barotropic EoS, p=ωρ, which can represent a late time accelerated phase of the cosmic evolution. The solution allows to cross the phantom divide without evoking an exotic matter fluid and the effective EoS parameter is always lesser than −1 and constant in time.
AB - In this paper we present a phantom solution with a big rip singularity in a non-linear regime of the Israel–Stewart formalism. In this framework it is possible to extend this causal formalism in order to describe accelerated expansion, where assumption of near equilibrium is no longer valid. We assume a flat universe filled with a single viscous fluid ruled by a barotropic EoS, p=ωρ, which can represent a late time accelerated phase of the cosmic evolution. The solution allows to cross the phantom divide without evoking an exotic matter fluid and the effective EoS parameter is always lesser than −1 and constant in time.
UR - http://www.scopus.com/inward/record.url?scp=85016786979&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2017.03.065
DO - 10.1016/j.physletb.2017.03.065
M3 - Article
AN - SCOPUS:85016786979
VL - 769
SP - 159
EP - 165
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
ER -