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- W2058904934 abstract "Singularities in the dark energy late universe are discussed under the assumption that the Lagrangian contains the Einstein term R plus a modified gravity term R α , where α is a constant. The 4D fluid is taken to be viscous and composed of two components, one Einstein component where the bulk viscosity is proportional to the scalar expansion ϑ, and another modified component where the bulk viscosity is proportional to the power ϑ2 α−1. Under these conditions, it is known from earlier work that the bulk viscosity can drive the fluid from the quintessence region (w > −1) into the phantomregion (w< −1), where w is the thermodynamical parameter [I. Brevik, Gen. Rel. Grav. 38, 1317 (2006)]. We combine this 4D theory with the 5D Randall-Sundrum II theory in which there is a single spatially flat brane situated at y = 0. We find that the Big Rip singularity, which occurs in 4D theory if α > 1/2, carries over to the 5D metric in the bulk, |y| > 0. The present investigation generalizes that of an earlier paper [I. Brevik, Eur. Phys. J. C 56, 579 (2008)] in which only a one-component modified fluid was present." @default.
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- W2058904934 date "2008-10-01" @default.
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- W2058904934 title "Two-fluid viscous modified gravity on an RS brane" @default.
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- W2058904934 doi "https://doi.org/10.1134/s0202289308040075" @default.
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