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.

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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 -