The square kinetic scalar field model satisfies the generalized second law on the apparent horizon during matter and dark energy eras, while the square root model fails in most major cosmological eras, making square kinetics thermodynamically preferred.
Thawing and Freezing Quintessence Models: A thermodynamic Consideration
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abstract
Thawing and freezing quintessence models are compared thermodynamically. Both of them are found to disobey the Generalized Second Law of Thermodynamics. However, for freezing models, there is still a scope as this breakdown occurs in the past, deep inside the radiation dominated era, when a standard scalar field model with a pressureless matter is not a correct description of the matter content. The thawing model has a pathological breakdown in terms of thermodynamics in a finite future.
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gr-qc 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
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Thermodynamics of scalar field models with kinetic corrections
The square kinetic scalar field model satisfies the generalized second law on the apparent horizon during matter and dark energy eras, while the square root model fails in most major cosmological eras, making square kinetics thermodynamically preferred.