TY - JOUR

T1 - Braneworld cosmological perturbation theory at low energy

AU - Soda, Jiro

AU - Kanno, Sugumi

N1 - Funding Information:
Acknowledgements This work was supported in part by Grant-in-Aid for Scientific Research Fund of the Ministry of Education, Science and Culture of Japan No. 155476 (SK) and No.14540258 (JS) and also by a Grant-in-Aid for the 21st Century COE “Center for Diversity and Universality in Physics”.

PY - 2005/9

Y1 - 2005/9

N2 - Homogeneous cosmology in the braneworld can be studied without solving bulk equations of motion explicitly. The reason is simply because the symmetry of the spacetime restricts possible corrections in the 4-dimensional effective equations of motion. It would be great if we could analyze cosmological perturbations without solving the bulk. For this purpose, we combine the geometrical approach and the low energy gradient expansion method to derive the 4-dimensional effective action. Given our effective action, the standard procedure to obtain the cosmological perturbation theory can be utilized and the temperature anisotropy of the cosmic background radiation can be computed without solving the bulk equations of motion explicitly.

AB - Homogeneous cosmology in the braneworld can be studied without solving bulk equations of motion explicitly. The reason is simply because the symmetry of the spacetime restricts possible corrections in the 4-dimensional effective equations of motion. It would be great if we could analyze cosmological perturbations without solving the bulk. For this purpose, we combine the geometrical approach and the low energy gradient expansion method to derive the 4-dimensional effective action. Given our effective action, the standard procedure to obtain the cosmological perturbation theory can be utilized and the temperature anisotropy of the cosmic background radiation can be computed without solving the bulk equations of motion explicitly.

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U2 - 10.1007/s10714-005-0139-3

DO - 10.1007/s10714-005-0139-3

M3 - Article

AN - SCOPUS:26844560849

VL - 37

SP - 1621

EP - 1628

JO - General Relativity and Gravitation

JF - General Relativity and Gravitation

SN - 0001-7701

IS - 9

ER -