TY - JOUR
T1 - Scalar perturbation in symmetric Lee-Wick bouncing universe
AU - Cho, Inyong
AU - Kwon, O. Kab
PY - 2011/11
Y1 - 2011/11
N2 - We investigate the scalar perturbation in the Lee-Wick bouncing universe driven by an ordinary scalar field plus a ghost field. We consider only a symmetric evolution of the universe and the scalar fields about the bouncing point. The gauge invariant Sasaki-Mukhanov variable is numerically solved in the spatially flat gauge. We find a new form of the initial perturbation growing during the contracting phase. After the bouncing, this growing mode stabilizes to a constant mode which is responsible for the late-time power spectrum.
AB - We investigate the scalar perturbation in the Lee-Wick bouncing universe driven by an ordinary scalar field plus a ghost field. We consider only a symmetric evolution of the universe and the scalar fields about the bouncing point. The gauge invariant Sasaki-Mukhanov variable is numerically solved in the spatially flat gauge. We find a new form of the initial perturbation growing during the contracting phase. After the bouncing, this growing mode stabilizes to a constant mode which is responsible for the late-time power spectrum.
KW - alternatives to inflation
KW - cosmological perturbation theory
UR - http://www.scopus.com/inward/record.url?scp=82955220256&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2011/11/043
DO - 10.1088/1475-7516/2011/11/043
M3 - Article
AN - SCOPUS:82955220256
SN - 1475-7516
VL - 2011
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 11
M1 - 043
ER -