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• W2024895846 abstract "For a 4-dimensional spatially-flat Friedmann-Robertson-Walker universe with a scalar field $phi(x)$, potential $V(phi)$ and constant equation of state $w=p/rho$, we show that an expanding solution characterized by $epsilon=3(1+w)/2$ produces the same scalar perturbations as a contracting solution with $hat{epsilon}=1/epsilon$. The same symmetry applies to both the dominant and subdominant scalar perturbation modes. This result admits a simple physical interpretation and generalizes to $d$ spacetime dimensions if we define $epsilon equiv [(2d-5)+(d-1)w]/(d-2)$." @default.
• W2024895846 created "2016-06-24" @default.
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• W2024895846 date "2004-07-19" @default.
• W2024895846 modified "2023-09-26" @default.
• W2024895846 title "New duality relating density perturbations in expanding and contracting Friedmann cosmologies" @default.
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• W2024895846 doi "https://doi.org/10.1103/physrevd.70.023504" @default.
• W2024895846 hasPublicationYear "2004" @default.
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