It seems to be a common understanding at present that, once event horizons are in thermal equilibrium, the entropy-area law holds inevitably. However no rigorous verification is given to such a very...
de Sitter thermodynamics in the canonical ensemble (2009)
The existing thermodynamics of the cosmological horizon in de-Sitter spacetime is established in the micro-canonical ensemble, while thermodynamics of black hole horizons are established in the...
Urano, Miho, Tomimatsu, Akira, Saida, Hiromi
The mechanical first law (MFL) of black hole spacetimes is a geometrical relation which relates variations of mass parameter and horizon area. While it is well known that the MFL of asymptotic flat...
Black Hole Evaporation as a Nonequilibrium Process (2008)
When a black hole evaporates, there arises a net energy flow from the black hole into its outside environment due to the Hawking radiation and the energy accretion onto black hole. Exactly speaking,...
Black Hole Evaporation and Generalized 2nd Law with Nonequilibrium Thermodynamics (2007)
In general, when a black hole evaporates, there arises a net energy flow from black hole into its outside environment due to Hawking radiation and energy accretion onto black hole. The existence of...
Black Hole Evaporation in an Expanding Universe (2007)
Saida, Hiromi, Harada, Tomohiro, Maeda, Hideki
We calculate the quantum radiation power of black holes which are asymptotic to the Einstein-de Sitter universe at spatial and null infinities. We consider two limiting mass accretion scenarios, no...
Black hole evaporation in a heat bath as a nonequilibrium process and its final fate (2007)
When a black hole evaporates, there arises a net energy flow from black hole into its outside environment (heat bath). The existence of energy flow means that the thermodynamic state of the whole...
When a black hole is in an empty space on which there is no matter field except that of the Hawking radiation (Hawking field), then the black hole evaporates and the entropy of the black hole...
Black Hole Evaporation and Nonequilibrium Thermodynamics for a Radiation Field (2005)
When a black hole is put in an "empty" space (zero temperature space) on which there is no matter except the matter of the Hawking radiation (Hawking field), then an outgoing energy flow from the...
Two-temperature Steady State Thermodynamics for a Radiation Field (2005)
A candidate for a consistent steady state thermodynamics is constructed for a radiation field in vacuum sandwiched by two black bodies of different temperatures. Because of the collisionless nature...
Steady State Thermodynamic Functions for Radiation Field (2003)
Several attempts to construct the thermodynamical formulation for non-equilibrium steady states have been made along the context by Oono and Paniconi, called the steady state thermodynamics (SST). In...
Hawking Radiation in the Swiss Cheese Universe (2002)
The Hawking radiation forms the essential basis of the black hole thermodynamics. The black hole thermodynamics denotes a nice correspondence between black hole kinematics and the laws of ordinary...
Black Hole in Higher Curvature Gravity and AdS/CFT Correspondence (2000)
The classical central charge for the higher curvature gravity in 3-dimensions is calculated using the Legendre transformation method. The statistical entropy of BTZ black hole is derived by the...
Black holes and a scalar field in an expanding universe (2000)
We consider a model of an inhomogeneous universe including a massless scalar field, where the inhomogeneity is assumed to consist of many black holes. This model can be constructed by following...
BTZ Black Hole Entropy in Higher Curvature Gravity (2000)
For the BTZ black hole in the Einstein gravity, a statistical entropy has been calculated. It is equal to the Bekenstein-Hawking entropy. In this article, its statistical entropy in the higer...
Statistical Entropy of BTZ Black Hole in Higher Curvature Gravity (1999)
For the BTZ black hole in the Einstein gravity, a statistical entropy has been calculated to be equal to the Bekenstein-Hawking entropy. In this paper, the statistical entropy of the BTZ black hole...