[ff9b2] %Read! @Online^ The Scalar-Tensor Theory of Gravitation (Cambridge Monographs on Mathematical Physics) - Yasunori Fujii !PDF%
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As was shown recently, the scalar-tensor theory of gravitation proposed by mbelek and lachièze-rey allows for a possible explanation of the forces reported in asymmetric microwave cavities. We show here that the theory in its revised version predicts a much simpler way of producing thrust by electrostatic means.
We search for viable f(r) theories of gravity, making use of the equivalence between such theories and scalar-tensor gravity. We find that models can be made consistent with solar system constraints either by giving the scalar a high mass or by exploiting the so-called chameleon effect. However, in both cases, it appears likely that any late-time cosmic acceleration will be observationally.
Jan 21, 2020 a spectrogram shows the rising frequency of gravitational waves emitted by new tests could verify the general theory of relativity, or find flaws.
Jul 25, 2019 does the physicist's theory tell the full story? on how much energy the photons expend to escape the black hole's powerful gravitational field.
Jul 25, 2019 einstein's 1915 general theory of relativity holds that what we the photons expend to escape the black hole's powerful gravitational field.
Predicted in 1916 by albert einstein to exist on the basis of his theory of general relativity, gravitational waves theoretically transport energy as gravitational.
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Since the scalar-tensor theory of gravitation was proposed almost 50 years ago, it has recently become a robust alternative theory to einstein's general relativity due to the fact that it appears.
The invariance is broken as a quantum anomaly effect due to non-gravitational interactions, naturally entailing a fifth force, characterized by a finite force-range.
Horndeski’ theory [32] presents the most general scalar-tensor theory of gravity ensuring no more than second-order field equations to avoid ghost instability due to ostrogradski theorem. Recently, in view of a general conserved current, obtained under suitable manipulation of the field.
In theoretical physics, a scalar–tensor theory is a field theory that includes both a scalar field and a tensor field to represent a certain interaction. For example, the brans–dicke theory of gravitation uses both a scalar field and a tensor field to mediate the gravitational interaction.
A scalar-tensor theory of gravitation is constructed using the weyl formulation of riemannian geometry. The scalar field is given an important geometrical role to play and is related to the integrable change in length of a vector as it is transported from point to point in space-time.
We present a scalar-tensor theory of gravity on a torsion-free and metric compatible lyra manifold. This is obtained by generalizing the concept of physical reference frame by considering a scale function defined over the manifold. The choice of a specific frame induces a local base, naturally non-holonomic, whose structure constants give rise to extra terms in the expression of the connection.
Which induces dynamically a repulsive gravitational force that is responsible for classes of theories, such as the scalar tensor theories of gravity.
An analysis of general scalar-tensor gravitation theory, containing two arbitrary functions of the scalar field, is presented. The weak-field limit is considered in detail, and predictions for the classical tests of gravitation theory are derived.
Spatially homogeneous, anisotropic, and tilted bianchi type- model is investigated in a new scalar-tensor theory of gravitation proposed by saez and ballester.
We revisit the thermodynamic aspects of the scalar-tensor theory of gravity in the jordan and in the einstein frame. Examining the \\it missing links of this theory carefully, we establish the thermodynamic descriptions from the conserved currents and potentials by following both the noether and the abbott-deser-tekin (adt) formalism.
The scalar-tensor theory of gravitation proposed by mbelek and lachièze-rey has been shown to lead to a possible explanation of the forces measured in asymmetric resonant microwave cavities.
An analysis of general scalar-tensor gravitation theory, containing two arbitrary functions of the scalar field, is presented. The weak-field limit is considered in detail, and predictions for the classical tests of gravitation theory are derived. A definite relationship between the light propagation and perihelion shift effects is found to hold under very general conditions.
Gravitational field equations for the vacuum static case of spherical symmetry are obtained in the scalar-tensor theory formulated by sen and dunn (1971).
Gr is, of course, a metric theory of gravity; so are scalar-vector-tensor theories such as brans–dicke theory, which include other gravitational fields in addition to the metric. By contrast, theories with dynamically varying fundamental constants and theories (such as superstring theory) that introduce additional wep-violating gravitational.
In this paper, we show that the brans-dicke scalar-tensor theory of gravitation, one of the most widely used generalizations of einstein's general relativity, is, in effect, time-asymmetric. This time-asymmetry may explain the observed time asymmetry of physical phenomena.
Oct 11, 2011 according to this principle, you can't tell whether you're in a gravitational field ( such as on the surface of the earth) or experiencing constant.
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We investigate the equality of inertial and gravitational mass in the brans-dicke theory of gravitation in both the classical and quantum case.
A new scalar‐tensor theory of gravitation is formulated in a modified riemannian manifold in which both the scalar and tensor fields have intrinsic geometrical significance. This is in contrast to the well‐known brans‐dicke theory where the tensor field alone is geometrized and the scalar field is alien to the geometry.
The scalar-tensor theory of gravitation is one of the most popular alternatives to einstein's theory of gravitation.
The importance of scalar–tensor theory of gravity has always increased since the advent of the brans–dicke [1] theory of gravity, which was originally introduced to incorporate mach principle. Later, brans–dicke field has been found to arise even from higher-dimensional theories, like superstring theories[2].
Field equations in the scalar-tensor theory of gravitation, proposed by saez and ballester (phys. A 113: 467, 1986), are obtained for a static charged point mass with the aid of a spherically symmetric metric. A closed form exact solution of the field equations is presented and may be considered as describing the field due to a charged mass point at the origin surrounded by a scalar.
Newton’s theory of gravitation is a stunningly successful theory, but it has fatal flaws. For centuries, astronomer used it to calculate the motions of the planets with astonishing success rate. But the world needs more consistent theory to understand the universe.
Feb 20, 2019 in this work we study gravitational and scalar waves emission of a it was generalized to multi-scalar-tensor theories of gravitation by damour.
We investigate the polarizations of gravitational waves in f(r) gravity and horndeski theory, both containing scalar modes.
It is noted that exponential inflation is forbidden in brans-dicke theory where ~o is a constant.
Subrata kumar keywords:saez and ballester theory, tilted cosmological model, scalar field.
Scalar-tensor theories of gravitation, in which gravity is mediated by a dicke, 1961), in which a scalar field, φ, acts as the source for the gravitational coupling.
The scalar-tensor theory of gravitation proposed by mbelek and lachièze-rey has been shown to lead to a possible explanation of the forces measured in asymmetric resonant microwave cavities. However, in the derivation of the equations from the action principle some inconsistencies were observed, like the need no to vary the electromagnetic.
Ester [8] have developed a new scalar tensor theory of gravitation in which the metric is coupled with a dimen-sionless scalar field in a simple manner. This coupling gives satisfactory description of the weak fields. In spite of the dimensionless character of the scalar field, an an-ti-gravity regime appears.
Brans–dicke theory is a scalar-tensor theory, not a scalar theory, meaning that it represents the gravitational interaction using both a scalar field and a tensor field. We mention it here because one of the field equations of this theory involves only the scalar field and the trace of the stress–energy tensor, as in nordström's theory.
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The constant g made its first appearance in classical gravity, centuries before einstein. In 1687, newton published his theory of universal gravitation which unified.
The additional scalar degree of freedom introduces a propagating monopole gravitational-wave mode.
Hence scalar-tensor theories of gravitation have become a focal point of interest in many areas of gravitational physics and cosmology. Here we have considered the scalar-tensor theory of gravitation proposed by saez and ballester (1985) in einstein-rosen cylindrically symmetric space-time.
A scalar‐tensor theory of gravitation is constructed using a non‐riemannian geometry in which both the metric tensor and the scalar function have an unambiguous geometric interpretation. The scalar function is introduced by defining a linear connection with nonvanishing torsion.
0521811597 - the scalar-tensor theory of gravitation yasunori fujii and kei-ichi maeda frontmatter more information.
Investigated generalization of general relativity: scalar-tensor theory. We start by considering theories where gravity is mediated by a single extra scalar degree of freedom (in addition to the metric tensor). An interesting class of scalar-tensor theories passes all experimental.
Plane symmetric solutions of a scalar-tensor theory proposed by dunn have been obtained.
Tensor–vector–scalar gravity (teves), developed by jacob bekenstein in 2004, is a relativistic generalization of mordehai milgrom 's modified newtonian dynamics (mond) paradigm. The main features of teves can be summarized as follows: as it is derived from the action principle, teves respects conservation laws;.
Newton's theory of gravitation is a scalar theory, so it seems natural to investigate a scalar component to gravity.
The scalar-tensor theory of gravitation moved into the limelight in recent years due to developments in string theory, m-theory and brane world constructions.
The scalar-tensor theory of gravitation moved into the limelight in recent years due to developments in string theory, m-theory and brane world.
The scalar-tensor theory of gravitation moved into the limelight in recent years due to developments in string theory, m-theory and 'brane world' constructions. This book introduces the subject at a level suitable for both graduate students and researchers.
The strong equivalence principle effectively forces gravitational theory to be general relativity.
In this paper, we develop a method based on the analysis of the kovalewski exponents to study the integrability of anisotropic and homogeneous universes. The formalism is developed in scalar-tensor gravity, the general relativistic case appearing as a special case of this larger framework. Then, depending on the rationality of the kovalewski exponents, the different models, both in the vacuum.
The scalar-tensor theory is widely discussed and used in tests of relativistic gravity, especially after the interests in inflation models and in dark energy models. In the lagrangian, intermediate-range gravity term has a similar form as cosmological term.
Cauchy problem for the brans-dicke scalar-tensor theory of gravitation may explain time asymmetry of physical processes.
Posts about scalar-tensor theories of gravity written by lee mcculloch-james.
Aug 10, 2018 in the gravitational sector, the theory contains the metric tensor, a scalar field and a background metric as an absolute variable of the theory.
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