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- W4385016795 abstract "We investigate the late-time cosmological dynamics in a simple case of explicit spacetime-symmetry breaking. By expanding in a small symmetry-breaking coefficient we are able to write the Friedmann equations as $Lambda$CDM + dynamical dark energy, which we show contains logarithmic dependence of the scale factor. We find that the dark energy equation of state displays divergences and phantom behaviour for certain values of the symmetry-breaking coefficient, where the Null Energy Condition is also broken. We also discuss the adiabatic sound speed of dark energy and compare the model to current constraints using the Chevallier-Polarski-Linder parametrisation." @default.
- W4385016795 created "2023-07-22" @default.
- W4385016795 creator A5035621861 @default.
- W4385016795 date "2023-07-18" @default.
- W4385016795 modified "2023-10-17" @default.
- W4385016795 title "Dark-energy properties of a spacetime-symmetry breaking cosmological solution -- late-time behaviour and phantom crossing" @default.
- W4385016795 doi "https://doi.org/10.48550/arxiv.2307.10290" @default.
- W4385016795 hasPublicationYear "2023" @default.
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