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This work is focused on the exploration of the thermodynamics foundations ofthe matter creation scenario when a generalized form of the second law ofthermodynamics for this scheme is implemented. In this scenario we consider anexpanding cosmology in which the created matter is trapped by the apparenthorizon. The scheme leads to phantom evolution but at first glance it lacks ofphysical consistency. However, the inclusion of chemical potential into thedescription solves the thermodynamics issues of the model and determines thebehavior of the cosmic fluid, in other words, the cosmic fluid now can behaveas phantom dark energy or as quintessence one.

Generalized second law of thermodynamics for the matter creation scenario and emergence of phantom regime