Generalized equilibrium of cosmological fluids in second-order thermodynamics
نویسندگان
چکیده
منابع مشابه
Structure formation and generalized second law of thermodynamics in some viable f(R)-gravity models
We investigate the growth of matter density perturbations as well as the generalized second law (GSL) of thermodynamics in the framework of f(R)-gravity. We consider a spatially flat FRW universe filled with the pressureless matter and radiation which is enclosed by the dynamical apparent horizon with the Hawking temperature. For some viable f(R) models containing the Starobinsky, Hu-Sawicki, Exp...
متن کاملCosmological particle production and generalized thermodynamic equilibrium
Winfried Zimdahl∗ Fakultät für Physik, Universität Konstanz, PF 5560 M678 D-78457 Konstanz, Germany Departament de F́ısica, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Barcelona), Spain and Laboratoire de Gravitation et Cosmologie Relativistes, Université Pierre et Marie CurieCNRS/URA 769 Tour 22, 4ème étage, Bôıte 142, 4, place Jussieu, 75252 Paris Cedex 05, France (December 2, 1997)
متن کاملCosmological Imprints of the Second Law of Thermodynamics
We study the full history of the universe in the presence of inflaton, matter, radiation, and holographic dark energy. The time evolution of the scale factor is obtained by solving the Friedmann equation of the universe without artificial ansatz. We discuss that the second law of thermodynamics dictates the accelerating expansion of the dark energy dominant phase to the universe. In addition, w...
متن کاملCosmological Imprint of the Second Law of Thermodynamics
We study the evolution of the universe in the presence of inflaton, matter, radiation, and holographic dark energy. The time evolution of the scale factor is obtained by solving the Friedmann equation of the universe with a good approximation. We present two independent ways which determine the value of the dark energy constant d ∼ 1 from the observational data. The two ways are measuring the d...
متن کاملEvolution of second-order cosmological perturbations
We present a method for constructing gauge-invariant cosmological perturbations which are gaugeinvariant up to second order. As an example we give the gauge-invariant definition of the second order curvature perturbation on uniform density hypersurfaces. Using only the energy conservation equation we show that this curvature perturbation is conserved at second order on large scales for adiabati...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 1999
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/16/10/312