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- W2897856766 abstract "By assuming a fluid description for dark energy, we propose a phenomenological approach which takes into the account effects microscopic based on the non-additive thermodynamics. These effects lead to a tiny perturbation in the perfect fluid which is the thermodynamics part of the standard model ($Λ$CDM model). The extra energy-momentum arises from the microscopic correlations captured through the distribution function of the 4-momentum of the volume element of the dark energy fluid. These correlations are taking into the account as a non-additive effect which is also related to a mechanism called Nonextensive/Extensive correspondence. This mechanism provides a way to introduce a non-additive bulk viscosity, which should be vanished in the additive limit, recovered, thus, the perfect fluid description. From the phenomenological standpoint, we motivate three models of bulk viscosity for dark energy and dark matter proposed recently, in the context of the non-additive formulation. In order to test the model, we perform a Bayesian analysis based on the data of CMB Distance priors, Baryon Acoustic Oscillations Measurements, Cosmic Chronometers, and SNe Ia distance measurements." @default.
- W2897856766 created "2018-10-26" @default.
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- W2897856766 date "2018-10-09" @default.
- W2897856766 modified "2023-10-17" @default.
- W2897856766 title "Non-Additive Viscous Dark Energy: A Bayesian Analysis" @default.
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