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- W2897593893 abstract "I show that a generic phenomenon can drive cosmic acceleration without the need for dark energy or modified gravity. When treating the universe as a system, one typically focuses on the scale factor (of an FRW spacetime) and ignores many other degrees of freedom. However, the information capacity of the discarded variables will inevitably change as the universe expands, generating quantum bias (QB) in the Friedmann equations [Phys. Lett. A 382, 36, 2555 (2018)|arXiv:1707.05789]. If information could be stored in each Planck-volume independently, this effect would give rise to a constant acceleration $10^{120}$ times larger than that observed, reproducing the usual cosmological constant problem. However, once information capacity is quantified according to the holographic principle, cosmic acceleration is far smaller and depends on the past behaviour of the scale factor. I calculate this holographic bias, derive the semiclassical Friedmann equations, and obtain their general solution for a spatially-flat universe containing matter and radiation. Comparing these QB-CDM solutions to those of $Lambda$CDM, the new theory is shown to be falsifiable, but nonetheless consistent with current observations. In general, realistic QB cosmologies undergo phantom acceleration ($w_mathrm{eff}<-1$) at late times, predicting a Big Rip in the distant future." @default.
- W2897593893 created "2018-10-26" @default.
- W2897593893 creator A5031575779 @default.
- W2897593893 date "2018-10-19" @default.
- W2897593893 modified "2023-09-27" @default.
- W2897593893 title "$mathcal{S}_mathrm{h}$CDM: Cosmic acceleration from holographic information capacity" @default.
- W2897593893 hasPublicationYear "2018" @default.
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