The Evolution And The Thermodynamical Properties For The Generalized Ghost Dark Enenrgy With Viscosity And Interaction In The Brans-dicke Universe

Astronomical observations in recent years show that our universe is in the accelerating expansion period.It is a hot issue that why the universe is accelerating.Now people have put forward many theories,and the dark energy theory is considered as the best one.A variety of dark energy models have been established,but all of them have their own advantages and disadvantages.In this thesis the evolution of generalized ghost dark enenrgy and its thermodynamcal behaviors are deeply studied in the Brans-Dicke theory.We firstly study the evolution of gen-eralized ghost dark enenrgy in the Brans-Dicke universe.Next we research the evolutions of cosmological quantities,such as wde,weff and q for three different interacting generalized ghost dark enenrgy with viscosity.When the interaction terms are respectlly Q1 = 3Hb2pde,Q2 = 3Hb2pdm and Q3 = 3Hb2(pdm+Pde),we find that the wde can cross the phantom divide and the viscosity can delay the crossing of phantom divide.Finally,on the basis of the above,we consider the thermodynamics and correction of entropy for the interacting generalized ghost dark enenrgy with viscosity in the Brans-Dicke gravitional theory,and get a relation between the interaction term and the thermodynamical fluctuation.