1,164 research outputs found

    Cosmological solutions for model with a 1/H21/H^{2} term

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    We drive the cosmological solutions of five-dimensional model with 1/H21/H^{2} term (H2≡HMNPQHMNPQ)(H^{2}\equiv H_{MNPQ}H^{MNPQ}), where HMNPQH_{MNPQ} is 4-form field strength. The behaviors of the scale factors and the scalar potential in effective theory are examined.As a consequence, we show that the universe changes from decelerated expansion to accelerated expansion in Einstein frame of the four-dimensional theory.Comment: 10 pages, 2 figures, version to appear in JCA

    Newton's law in braneworlds with an infinite extra dimension

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    We study the behavior of the four−-dimensional Newton's law in warped braneworlds. The setup considered here is a (3+n)(3+n)-brane embedded in (5+n)(5+n) dimensions, where nn extra dimensions are compactified and a dimension is infinite. We show that the wave function of gravity is described in terms of the Bessel functions of (2+n/2)(2+n/2)-order and that estimate the correction to Newton's law. In particular, the Newton's law for n=1n=1 can be exactly obtained

    Correction terms to Newton law due to induced gravity in AdS background

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    We calculate small correction terms to gravitational potential on Randall-Sundrum brane with an induced Einstein term. The behaviors of the correction terms depend on the magnitudes of AdSAdS radius k−1k^{-1} and a characteristic length scale \l of model. We represent the gravitational potential for arbitrary kk and \l at all distances.Comment: 7 pages, no figure. To appear in Phys. Lett.
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