Brane world cosmological perturbations
Adenauer G. CasaliInstituto De Fisica, Universidade De Sao Paulo, C. P. 66.318, CEP 05315-970, Sao Paulo, BrazilÉlcio AbdallaInstituto De Fisica, Universidade De Sao Paulo, C. P. 66.318, CEP 05315-970, Sao Paulo, BrazilBin WangDepartment of Physics, Fudan University, Shanghai 200433, People's Republic of China
2004en
ABI
Abstract
We consider a brane world and its gravitational linear perturbations. We present a general solution of the perturbations in the bulk and find the complete perturbed junction conditions for generic brane dynamics. We also prove that (spin 2) gravitational waves in the great majority of cases can arise only in connection with a non-vanishing anisotropic stress. This has far reaching consequences for inflation in the brane world. Moreover, contrary to the case of the radion, the perturbations are stable.
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