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- W2034006747 abstract "We present a phase-space analysis of cosmology containing multiple scalar fields with a positive or negative cross-coupling exponential potential. We show that there exist power-law kinetic–potential-scaling solutions for a sufficiently flat positive potential or for a steep negative potential. The former is the unique late-time attractor, but it is difficult to yield assisted inflation. The later is never stable in an expanding universe. Moreover, for a steep negative potential there exists a kinetic-dominated regime in which each solution is a late-time attractor. In the presence of ordinary matter these scaling solutions with a negative cross-coupling potential are found unstable. We briefly discuss the physical consequences of these results." @default.
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- W2034006747 date "2003-12-01" @default.
- W2034006747 modified "2023-10-03" @default.
- W2034006747 title "Cosmological scaling solutions and cross-coupling exponential potential" @default.
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- W2034006747 doi "https://doi.org/10.1016/j.physletb.2003.09.074" @default.
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