MULTIDIMENSIONAL COSMOLOGY AND FUNDAMENTAL CONSTANTS

2009 ◽  
Vol 24 (08n09) ◽  
pp. 1473-1480 ◽  
Author(s):  
V. N. MELNIKOV
Keyword(s):  
Black Holes ◽  
Fundamental Constants ◽  
Fundamental Physical Constants ◽  
Cosmological Singularity ◽  
Brane Worlds ◽  
Multidimensional Cosmology ◽  
Multidimensional Models ◽  
Different Sources ◽  
Fundamental Physical ◽  
Kaluza Klein

Studies of multidimensional models with different sources (models with S -branes, thin and thick brane worlds, Kaluza-Klein type models in curvature-nonlinear multidimensional gravity etc.) and their application to the cosmological constant, cosmological singularity, hierarchy and coincidence problems are presented. Their observational predictions: variations of fundamental physical constants, new types of black holes and wormholes are discussed.

MULTIDIMENSIONAL COSMOLOGY, CONSTANTS AND TRANSITION TO NEW SI UNITS

2011 ◽  
Vol 26 (22) ◽  
pp. 3788-3800 ◽  
Author(s):  
V. N. MELNIKOV
Keyword(s):  
Extra Dimensions ◽  
Anisotropic Fluid ◽  
Spherically Symmetric ◽  
Fundamental Physical Constants ◽  
Multidimensional Cosmology ◽  
The Family ◽  
Fluid Matter ◽  
Dimensional Section ◽  
New Si ◽  
Fundamental Physical

Main current problems of physics, gravitation and cosmology in particular are analyzed. Special attention is paid to results of the theory with extra dimensions and variations of fundamental physical constants. As an example the family of spherically symmetric solutions with horizon with multi-component anisotropic fluid is presented. The metrics of solutions are defined on a manifold that contains a product of n-1 Ricci-flat "internal" spaces. A simulation of black brane solutions is considered. For the solution with the fluid matter the post-Newtonian parameters β and γ corresponding to the 4-dimensional section of the metric are found.

scholarly journals MULTIDIMENSIONAL COSMOLOGY, CONSTANTS AND TRANSITION TO NEW SI UNITS

2011 ◽  
Vol 03 ◽  
pp. 170-182
Author(s):  
V. N. MELNIKOV
Keyword(s):  
Extra Dimensions ◽  
Anisotropic Fluid ◽  
Spherically Symmetric ◽  
Fundamental Physical Constants ◽  
Multidimensional Cosmology ◽  
The Family ◽  
Fluid Matter ◽  
Dimensional Section ◽  
New Si ◽  
Fundamental Physical

Main current problems of physics, gravitation and cosmology in particular are analyzed. Special attention is paid to results of the theory with extra dimensions and variations of fundamental physical constants. As an example the family of spherically symmetric solutions with horizon with multi-component anisotropic fluid is presented. The metrics of solutions are defined on a manifold that contains a product of n - 1 Ricci-flat "internal" spaces. A simulation of black brane solutions is considered. For the solution with the fluid matter the post-Newtonian parameters β and γ corresponding to the 4-dimensional section of the metric are found.

scholarly journals DISCRETE QUANTUM GRAVITY: A MECHANISM FOR SELECTING THE VALUE OF FUNDAMENTAL CONSTANTS

2003 ◽  
Vol 12 (09) ◽  
pp. 1775-1781 ◽  
Author(s):  
RODOLFO GAMBINI ◽  
JORGE PULLIN
Keyword(s):  
Quantum Gravity ◽  
Selection Process ◽  
Einstein Equations ◽  
Fundamental Constants ◽  
Fundamental Physical Constants ◽  
Physical Constants ◽  
Random Fashion ◽  
The One ◽  
The Universe ◽  
Fundamental Physical

Smolin has put forward the proposal that the universe fine tunes the values of its physical constants through a Darwinian selection process. Every time a black hole forms, a new universe is developed inside it that has different values for its physical constants from the ones in its progenitor. The most likely universe is the one which maximizes the number of black holes. Here we present a concrete quantum gravity calculation based on a recently proposed consistent discretization of the Einstein equations that shows that fundamental physical constants change in a random fashion when tunneling through a singularity.

scholarly journals ON THE ISSUE OF STUDYING FUNDAMENTAL PHYSICAL CONSTANTS

2020 ◽  
Author(s):  
M. Volkova ◽  
Keyword(s):  
Fundamental Constants ◽  
Fundamental Physical Constants ◽  
Physical Constants ◽  
Fundamental Properties ◽  
The World ◽  
Fundamental Physical

The article analyzes the most profound and fundamental properties of the world around us, manifested in the sense of fundamental physical constants. The stages of studying and forming ideas about fundamental constants are considered.

Possible new definitions of the kilogram

2005 ◽  
Vol 363 (1834) ◽  
pp. 2249-2264 ◽  
Author(s):  
R.S Davis
Keyword(s):  
International System ◽  
Fundamental Constants ◽  
Planck Constant ◽  
Fundamental Physical Constants ◽  
Target Uncertainty ◽  
Long Term Stability ◽  
Modern Physics ◽  
Newtonian Constant ◽  
Fundamental Physical

Summary The kilogram is the unit of mass in the International System. Its definition dates from 1889 and, therefore, predates most of modern physics. The definition simply states that the ‘kilogram’ is the mass of an object known as the international prototype. Thus, we have the extraordinary situation that certain fundamental physical constants (the Planck constant, the Newtonian constant of gravitation, the mass of an electron, the mass of an atom of carbon-12, etc.) are measured in terms of an artefact that was manufactured in the nineteenth century. We begin by describing what is presently known about the long-term stability of artefact standards and how this stability can be experimentally monitored with respect to fundamental constants of physics. Finally, we suggest that present experiments are close to achieving the target uncertainty of the order 10 −8 , although the current incoherence between two classes of experiments is cause for concern.

The determination of best values of the fundamental physical constants

2005 ◽  
Vol 363 (1834) ◽  
pp. 2105-2122 ◽  
Author(s):  
Barry N Taylor
Keyword(s):  
Least Squares ◽  
Science And Technology ◽  
Fundamental Constants ◽  
Fundamental Physical Constants ◽  
Physical Constants ◽  
Self Consistent ◽  
Modern Physics ◽  
Least Squares Adjustment ◽  
Fundamental Physical

The purpose of this paper is to provide an overview of how a self-consistent set of ‘best values’ of the fundamental physical constants for use worldwide by all of science and technology is obtained from all of the relevant data available at a given point in time. The basis of the discussion is the 2002 Committee on Data for Science and Technology (CODATA) least-squares adjustment of the values of the constants, the most recent such study available, which was carried out under the auspices of the CODATA Task group on fundamental constants. A detailed description of the 2002 CODATA adjustment, which took into account all relevant data available by 31 December 2002, plus selected data that became available by Fall of 2003, may be found in the January 2005 issue of the Reviews of Modern Physics . Although the latter publication includes the full set of CODATA recommended values of the fundamental constants resulting from the 2002 adjustment, the set is also available electronically at http://physics.nist.gov/constants .

A Cosmological View for the Time - Variation of the Fundamental Constants of Nature

2020 ◽  
Vol 18 (12) ◽  
pp. 18-29
Author(s):  
Layali Y. Salih AL-Mashhadani ◽  
Ahmed H. Abdullah
Keyword(s):  
Time Variation ◽  
Gravitational Constant ◽  
Cosmic Time ◽  
Detailed Comparison ◽  
Fundamental Constants ◽  
Fundamental Physical Constants ◽  
Half Century ◽  
Variation Of Constants ◽  
Fundamental Physical ◽  
Constants Of Nature

Time variation of constants of nature is still a question of debate among astronomers, physicists, geologists, and palaeontologists. But are the fundamental physical constants really varying in space or time and how changing these parameters may occur?. Paul Dirac was interested in this question in the large number hypothesis (LNH). He arrived by coincidence at the revolutionary hypothesis that the gravitational constant G should be varied inversely with the cosmic time t. LNH sparked off many ideas and arguments about the possibility of time or space variations of the fundamental constants of nature. In this work, we review details and arguments regarding the time and space variation of dimensional and dimensionless constants based on a detailed comparison for the recorded literature over about one and a half-century.

Values of the fundamental physical constants according to agreements in 1969

1970 ◽  
Vol 13 (8) ◽  
pp. 1124-1130 ◽  
Author(s):  
S. V. Gorbatsevich ◽  
V. M. Holin ◽  
V. N. Nosal'
Keyword(s):  
Fundamental Physical Constants ◽  
Physical Constants ◽  
Fundamental Physical
Sign in / Sign up

Export Citation Format

Share Document