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Zhang L., Zhao R., Ma M.  Black hole entropy in the ReissnerNordströmde Sitter model


pp. 59

DOI: 10.7256/24538817.2017.1.21538
Abstract: The paper studies the development of the macroscopic methods of highenergy physics analysis. The authors consider the evolution of black holes within the phenomenological approach, analogous to classical thermodynamics, in which the black hole area determines its entropy, and the surface gravitation, correspondingly,  the temperature, in the framework of the relativist cosmological model (de Sitter universe). The research subject is the ways of calculation of effective thermodynamic properties of black holes. To calculate a black hole entropy, the authors apply the event horizon and cosmological horizon interdependence hypothesis. To accomplish the research task, the authors apply the system and structuralfunctional approaches, the methods of cosmology, relativistic mechanics and Einstein’s geometric theory of gravitation, in particular, the exact solutions of the Einstein field equations with the cosmological constant for the Reissner Nordström metric for the spacetime description. The authors find the analytical solution for the calculation of the total entropy of a spherically symmetric charged black hole in the Reissner Nordström model for de Sitter universe. The paper shows that the expression for entropy includes not only the sum of entropies of the event horizon and cosmological horizon of the black hole, but also the additional term, taking into account their entanglement. The obtained results of black hole thermodynamics extend the analogy with the first law of thermodynamics, thus broadening the applicability of the approach to the cosmological studies.
Keywords:
Black holes Physics, Reissner–Nordström metric, de Sitter space, General relativity theory, Cosmology, Theoretical Physics, Event horizon, Cosmological horizon, Entropy, Surface gravity
Serga E.V.  Physical vacuum as a form of matter: a new perspective on its structure and properties



DOI: 10.7256/24538817.2017.2.23245
Abstract: The research subject is the physical (space) vacuum as a matter. In modern science there is no common understanding of the nature of the physical vacuum. The Quantum Field Theory knows some vacuum effects that characterize vacuum as a matter. The Condensed Matter Physics considers vacuum as a quantum liquid that is characterized by superfluidity. The Celestial Mechanics, Cosmology, and Space Exploration consider vacuum as empty space. The objectives of this study are 1) compilation and systematization of data on the structure, properties and the vacuum effects observed in the microcosm and the Space, and conceptual approaches to their interpretation; 2) analysis of emerging contradictions and the search for theoretical models consistently explaining the existing data on the physical vacuum; 3) substantiation of the method of validation of the presented solution. The key prerequisites for this study are the ideas about gravitational interactions symmetry as a physical reality, about the unity of the vacuum theory both in microphysics and cosmophysics. To solve the research tasks, the author uses general scientific methods and research techniques (generalization, analysis, synthesis), the methods of formal logic, the hypotheticodeductive method, and modeling. The author designs a theoretical model, which consistently explains the combination of qualities of physical vacuum as empty space and condensed elastic medium. Based on the proposed model, the author studies the impact of vacuum on the movement of celestial bodies and explains the range of vacuum effects in microcosm and the space, including the emergence of inertia in vacuum. The author offers the experiment scheme, based on the use of artificial Earth satellites, for defining the impact of vacuum on the movement of celestial bodies.
Keywords:
Speed of gravity, Antigravity, Inertia, Vacuum polarization, Mercury's Perihelion Shift, Space wind, Vacuum effects, Physical vacuum, Quantum fluid, Redshift
Serga E.V.  On the perfect vacuum theory: transmission of electromagnetic and gravitational waves



DOI: 10.7256/24538817.2017.3.24579
Abstract: The research subject is the space (perfect) vacuum as a material medium. The research task is search for the grounds to the development of a consistent scientific explanation of the set of observed vacuum effects in microphysics and macrophysics – a unified vacuum theory. The presented vacuum theory is the continuation of the views of vacuum as a material medium formed in the works by I. Newton, M. Faraday, J.C. Maxwell and H.R. Hertz with account for the recent scientific research. The key premises of the study are the ideas about the symmetry of gravitational interactions as a physical reality and about the unity of the vacuum theory in microphysics and cosmophysics. To solve the research tasks, the author uses general scientific methods and methodologies (generalization, analysis, synthesis), the methods of formal logic, hypotheticodeductive method and modeling. Special attention is given to the explanation of the mechanism of transmission of electromagnetic and gravitational waves in vacuum. To develop the theoretical model of vacuum and explain its application using these processes, the author accepts the effect of occurrence of “particleantiparticle” pairs in vacuum as a root idea. Theoretically determined spectra of electromagnetic waves in various diapasons conform with the observed values. The author formulates the new theoretical definition of possible gravitation speed which, according to the calculations, is about 1018 speed of light.
Keywords:
Vacuum effect, Quantum fluid, Antigravity, Speed of gravity, Gravitational wave, Electromagnetic wave, Aether theories, Physical vacuum, Vacuum pair, Compton wavelength
DOI: 10.7256/24538817.2017.4.25139
Abstract:
Keywords:
Space Vacuum, Redshift, Raman scattering, Cosmology, Tired light, Expantion of space, Hubble's law, Belopolsky's Hypothesis, Galaxy, Quasar
