جستجوی مقالات مرتبط با کلیدواژه "سیاهچاله" در نشریات گروه "فیزیک"

In this paper, a charged AdS black hole is considered and exponential corrections on entropy ‎are studied for it. Next, thermodynamic quantities of this black hole, including mass, ‎temperature, heat capacity, as well as pressure and Gibbs free energy, are investigated. Then, ‎the thermodynamic geometry of this black hole is investigated using the geometric methods of ‎Weinhold, Ruppeiner, Quevedo, HPEM and NTG. In addition, the correspondence between ‎singularities of the scalar curvature of these metrics and the black hole phase transition points ‎is investigated. It has been observed that Quevedo (II), HPEM and NTG formalisms provide ‎more information about the phase transition of this black hole compared with Weinhold, ‎Ruppeiner and Quevedo (I) formalisms.‎

In recent years, modified gravity models have played an important role in the cosmological structures. One of these models is F(R) gravity theory which opened a new insight in the context of black hole thermodynamics. Some of interesting consequences of the black hole thermodynamics resulted into investigation of thermal properties of different black holes. In this paper, first we investigate topological Lifshitz-like black hole solutions of F(R) gravity in d-dimensions and then study thermodynamic properties of such special class of F(R) gravity. Finally, we examine thermal stability and possible phase transition with respect to the heat capacity and Gibbs free energy.

In this paper, the second and third order corrections of the curvature tensor to the holographic complexity of a temperature state in the coherent field theory are studied. Dual geometry of  this  temperate state  is Schwarzschild's anti deSitter black hole geometry. The calculations made in this paper show that considering these new sentences will only appear as a constant coefficient in the final result, that is the rate of complexity growth over long periods of time.

In this paper، we considered cosmological constant as a variable and studied properties and the thermodynamics stability of BTZ black hole from a geometric perspective. Also، we examined the correspondence between thermodynamic curvature singularities and phase transitionpoints with different thermodynamic metrics. We found that theQuevedo metric cannot predict the phase transition points in two ensembles. This result is also valid for the kerr-de sitter spacetime.

In this paper, the rotating black brane solutions with zero curvature horizon of classical gravity with first order string corrections are introduced. Although these solutions are not asymptotically anti de Sitter, one can use the counterterm method in order to compute the conserved quantities of these solutions. Here, by reviewing the counterterm method for asymptotically anti de Sitter spacetimes, the conserved quantities of these rotating solutions are computed. Also a Smarr-type formula for the mass as a function of the entropy and the angular momenta is obtained, and it is shown that the conserved and thermodynamic quantities satisfy the first law of thermodynamics. Finally, a stability analysis in the canonical ensemble is performed, and it is shown that the system is thermally stable. This is in commensurable with the fact that there is no Hawking-Page phase transition for black object with zero curvature horizon.