TY - JOUR
T1 - Viscous dark energy and phantom evolution
AU - Cataldo, Mauricio
AU - Cruz, Norman
AU - Lepe, Samuel
N1 - Funding Information:
N.C. and S.L. acknowledge the hospitality of the Physics Department of Universidad de Concepción where an important part of this work was done last January. S.L. acknowledges the hospitality of the Physics Department of Universidad de Santiago de Chile. We thank the suggestion of a new reference given by the referee, in order to improve the presentation of this Letter. We acknowledge the partial support to this research by CONICYT through grants Nos. 1051086, 1030469 and 1040624 (M.C.); No. 1040229 (N.C. and S.L.); grant MECESUP USA0108 (N.C.). It also was supported by the Direccion de Investigación de la Universidad del Bío–Bío (M.C.), PUCV Grant 123.771/04 (S.L.).
PY - 2005/7/14
Y1 - 2005/7/14
N2 - In order to study if the bulk viscosity may induce a big rip singularity on the flat FRW cosmologies, we investigate dissipative processes in the universe within the framework of the standard Eckart theory of relativistic irreversible thermodynamics, and in the full causal Israel-Stewart-Hiscock theory. We have found cosmological solutions which exhibit, under certain constraints, a big rip singularity. We show that the negative pressure generated by the bulk viscosity cannot avoid that the dark energy of the universe to be phantom energy.
AB - In order to study if the bulk viscosity may induce a big rip singularity on the flat FRW cosmologies, we investigate dissipative processes in the universe within the framework of the standard Eckart theory of relativistic irreversible thermodynamics, and in the full causal Israel-Stewart-Hiscock theory. We have found cosmological solutions which exhibit, under certain constraints, a big rip singularity. We show that the negative pressure generated by the bulk viscosity cannot avoid that the dark energy of the universe to be phantom energy.
UR - http://www.scopus.com/inward/record.url?scp=20544442259&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2005.05.029
DO - 10.1016/j.physletb.2005.05.029
M3 - Article
AN - SCOPUS:20544442259
SN - 0370-2693
VL - 619
SP - 5
EP - 10
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-2
ER -