Abstract
We study a two 3-branes system embedded in a 5-dimensional spacetime with the fifth dimension compactified on a \(S^{1}/Z_{2}\) orbifold. Assuming isotropic and homogeneous branes, we show that the dynamics of the visible brane affects the hidden brane through gravitational interaction. This influence is described by equations that relate the matter contents on each brane, and arise from the Israel’s junction conditions. We analyse the case in which both branes are composed of a single matter field with a vacuum bulk, and explore the different possibilities allowed for the cosmologies of the branes.
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Notes
Notice that we are using units with \(c=\hbar =1\), and that indices are \(\mu ,\nu = 0,1,2,3, i,j=1,2,3\), and \(A,B = 0,1,2,3,4\).
The following inequality is valid for \(m < 3(1+ \omega )\) otherwise it is reversed except for \(m=3(1+ \omega )\) where the expression inside the absolute value is a constant.
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Acknowledgments
We thank M. A. García-Aspeitia for useful comments. LAU-L thanks the Royal Observatory, Edinburgh, where part of this work was done during a sabbatical stay, for its kind hospitality. We acknowledge partial support by SNI-México, CONACyT research Grants J1-60621-I, 103478, COFAA-IPN and SIP-IPN Grant 20131541 and 20144150. This work was partially supported by PIFI, PROMEP, DAIP-UG, CONACyT México under Grants 167335 and 179881, the Fundación Marcos Moshinsky, and the Instituto Avanzado de Cosmología (IAC) collaboration.
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Pérez, J.L., Ureña-López, L.A. & Cordero, R. Cosmological constraints for a two branes system in a vacuum bulk. Gen Relativ Gravit 47, 2 (2015). https://doi.org/10.1007/s10714-014-1847-3
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DOI: https://doi.org/10.1007/s10714-014-1847-3