TY - JOUR
T1 - Cosmological perturbation with two scalar fields in reheating after inflation
AU - Taruya, A.
AU - Nambu, Y.
N1 - Funding Information:
This work is partly supported by the Grand-In-Aid for Scientific Research of the Ministry of Education, Science, Sports and Culture of Japan (09740196).
PY - 1998/5/28
Y1 - 1998/5/28
N2 - We investigate the cosmological perturbation of two-scalar field model during the reheating phase after inflation. Using the exact solution of the perturbation in long-wavelength limit, which is expressed in terms of the background quantities, we analyze the behavior of the metric perturbation. The oscillating inflaton field gives rise to the parametric resonance of the massless scalar field and this leads to the amplification of the iso-curvature mode of the metric perturbations.
AB - We investigate the cosmological perturbation of two-scalar field model during the reheating phase after inflation. Using the exact solution of the perturbation in long-wavelength limit, which is expressed in terms of the background quantities, we analyze the behavior of the metric perturbation. The oscillating inflaton field gives rise to the parametric resonance of the massless scalar field and this leads to the amplification of the iso-curvature mode of the metric perturbations.
UR - http://www.scopus.com/inward/record.url?scp=0346551645&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0346551645&partnerID=8YFLogxK
U2 - 10.1016/S0370-2693(98)00378-5
DO - 10.1016/S0370-2693(98)00378-5
M3 - Article
AN - SCOPUS:0346551645
SN - 0370-2693
VL - 428
SP - 37
EP - 43
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 -