181
181
Jun 21, 2019
06/19
by
Dirac, P. A. M. (Paul Adrien Maurice), 1902-
texts
eye 181
favorite 6
comment 0
viii, 69 p. ; 23 cm
Topic: General relativity (Physics)
8
8.0
Apr 26, 2022
04/22
by
Hobson, M. P. (Michael Paul), 1967-
texts
eye 8
favorite 2
comment 0
xviii, 572 p. : 26 cm
Topic: General relativity (Physics)
133
133
Jun 15, 2011
06/11
by
Harpaz, Amos
texts
eye 133
favorite 1
comment 0
Includes bibliographical references and index
Topic: General relativity (Physics)
Source: removedNEL
1,007
1.0K
Jun 18, 2019
06/19
by
Wald, Robert M
texts
eye 1,007
favorite 11
comment 0
xiii, 491 p. : 25 cm
Topic: General relativity (Physics)
13
13
Mar 26, 2022
03/22
by
Clarke, C. J. S. (Christopher James Seaton), 1946-
texts
eye 13
favorite 2
comment 0
ix, 131 p. : 24 cm
Topic: General relativity (Physics)
39
39
Oct 14, 2021
10/21
by
Kenyon, I. R
texts
eye 39
favorite 1
comment 0
234 p. : 25 cm
Topic: General relativity (Physics)
12
12
Jan 26, 2022
01/22
by
Buchdahl, H. A. (Hans Adolph), 1919-
texts
eye 12
favorite 0
comment 0
xiii, 174 p. ; 24 cm
Topic: General relativity (Physics)
565
565
Jul 16, 2019
07/19
by
Adler, Ronald
texts
eye 565
favorite 4
comment 0
xv, 451 p. :
Topic: General relativity (Physics)
87
87
Jun 18, 2019
06/19
by
Atwater, H. A. (Harry Albert), 1921-
texts
eye 87
favorite 2
comment 0
viii, 224 p. 22 cm
Topic: General relativity (Physics)
35
35
texts
eye 35
favorite 1
comment 0
472 p. 25 cm
Topic: General relativity (Physics)
17
17
Dec 2, 2020
12/20
by
Ferreira, Pedro G., author
texts
eye 17
favorite 3
comment 0
1 volume
Topics: Einstein, Albert, 1879-1955, General relativity (Physics) -- History, General relativity (Physics)...
33
33
Jul 17, 2021
07/21
by
Bowler, M. G
texts
eye 33
favorite 3
comment 0
x, 172 p. : 25 cm
Topics: Gravitation, General relativity (Physics)
16
16
Jul 27, 2021
07/21
by
Conference on Classical (Non-Quantum) General Relativity (1983 : London, England)
texts
eye 16
favorite 0
comment 0
xv, 269 p. : 26 cm
Topic: General relativity (Physics) -- Congresses
6
6.0
Apr 27, 2022
04/22
by
Weber, J. (Joseph), 1919-
texts
eye 6
favorite 0
comment 0
viii, 200 p. : 22 cm
Topics: General relativity (Physics), Gravitation
762
762
Dec 17, 2013
12/13
by
Schutz, Bernard F
texts
eye 762
favorite 7
comment 0
Includes bibliographical references (p. [378]-385) and index
Topics: General relativity (Physics), Astrophysics
Source: removedNEL
211
211
Nov 14, 2013
11/13
by
Elizabeth Stanway
texts
eye 211
favorite 0
comment 0
Objectives: � To introduce the stress�energy tensor � Conservation laws in relativity
Topics: Physics, Special Relativity, General Relativity and Gravitation, Classical General Relativity,...
Source: http://www.flooved.com/reader/3154
51
51
Jul 9, 2019
07/19
by
Weber, J. (Joseph), 1919-
texts
eye 51
favorite 1
comment 0
200 p. 21 cm
Topics: General relativity (Physics), Gravitation
17
17
texts
eye 17
favorite 1
comment 0
216 p. ; 24 cm
Topics: Gravitation, General relativity (Physics)
10
10.0
Nov 4, 2021
11/21
by
Fang, Lizhi
texts
eye 10
favorite 2
comment 0
ix, 218 p. : 23 cm
Topics: Astrophysics, General relativity (Physics)
16
16
Jul 26, 2019
07/19
by
Bonnor, W. B. (William B.)
texts
eye 16
favorite 1
comment 0
19 l. 25 cm
Topics: Astrophysics, General relativity (Physics)
153
153
Jan 10, 2012
01/12
by
Will, Clifford M., 1946-
texts
eye 153
favorite 1
comment 0
Bibliography: p. [259]-261
Topics: General relativity (Physics), Astrophysics
4
4.0
Jun 29, 2018
06/18
by
Seema Satin; H. T. Cho; Bei Lok Hu
texts
eye 4
favorite 0
comment 0
For a conformally-coupled scalar field we obtain the conformally-related Einstein-Langevin equations, using appropriate transformations for all the quantities in the equations between two conformally-related spacetimes. In particular, we analyze the transformations of the influence action, the stress energy tensor, the noise kernel and the dissipation kernel. In due course the fluctuation-dissipation relation is also discussed. The analysis in this paper thereby facilitates a general solution...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1603.06206
3
3.0
Jun 29, 2018
06/18
by
Gonzalo García-Reyes
texts
eye 3
favorite 0
comment 0
By starting with a seed Newtonian potential-density pair we construct relativistic thick spherical shell models for a Majumdar-Papapetrou type conformastatic spacetime. As a simple example, we consider a family of Plummer-Hernquist type relativistic spherical shells. As a second application, these structures are then used to model a system composite by a dust disk and a halo of matter. We study the equatorial circular motion of test particles around such configurations. Also the stability of...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1608.01918
5
5.0
Jun 29, 2018
06/18
by
Denisa-Andreea Mihu
texts
eye 5
favorite 0
comment 0
Within the context of a cosmic space whose energy source is modeled with a perfect fluid, a uniform model of Universe based on a standard FRW cosmology containing decoupled mixed matter sources namely stiff matter and cosmic dust together with a positive cosmological constant, has been studied. Within the scenario of a $k=0-$ spatially-flat geometry, we analysed the geometrodynamics of the theoretical cosmology. For the model with an added cosmological constant, the main scope was to point out...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1609.00589
3
3.0
Jun 29, 2018
06/18
by
Morgan H. Lynch; Niayesh Afshordi
texts
eye 3
favorite 0
comment 0
We compute the instantaneous temperature registered by an Unruh-DeWitt detector coupled to a Hadamard renormalizable massless quantum field in a generic state, which is moving along an accelerated trajectory in curved spacetime. The general expression for the temperature depends on the 4-acceleration, Raychaudhuri scalar, and renormalized field polarization. We can further find a novel constraint on the renormalized quantum field polarization in relativistic systems in global thermal...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1611.06619
3
3.0
Jun 29, 2018
06/18
by
Carlo Alberto Mantica; Luca Guido Molinari
texts
eye 3
favorite 0
comment 0
Robertson-Walker and Generalized Robertson-Walker spacetimes may be characterized by the existence of a time-like unit torse-forming vector field, with other constrains. We show that Twisted manifolds may still be characterized by the existence of such (unique) vector field, with no other constrain. Twisted manifolds generalize RW and GRW spacetimes by admitting a scale function that depends both on time and space. We obtain the Ricci tensor, corresponding to the stress-energy tensor of an...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1612.06715
4
4.0
Jun 30, 2018
06/18
by
Emanuele Alesci; Francesco Cianfrani
texts
eye 4
favorite 0
comment 0
We discuss the semiclassical limit of Quantum Reduced Loop Gravity, a recently proposed model to address the quantum dynamics of the early Universe. We apply the techniques developed in full Loop Quantum Gravity to define the semiclassical states in the kinematical Hilbert space and evaluating the expectation value of the euclidean scalar constraint we demonstrate that it coincides with the classical expression, {\it i.e.} the one of a local Bianchi I dynamics. The result holds as a leading...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1402.3155
5
5.0
Jun 30, 2018
06/18
by
S. Habib Mazharimousavi; M. Halilsoy; Z. Amirabi
texts
eye 5
favorite 0
comment 0
We construct thin shell wormholes in the magnetic Melvin universe. It is shown that in order to make a TSW in the Melvin spacetime the radius of the throat can not be larger than $\frac{2}{B_{0}}$ in which $B_{0}$ is the magnetic field constant. We also analyze the stability of the constructed wormhole in terms of a linear perturbation around the equilibrium point. In our stability analysis we scan a full set of the Equation of States such as Linear Gas, Chaplygin Gas, Generalized Chaplygin...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1403.6940
3
3.0
Jun 30, 2018
06/18
by
Luca Fabbri
texts
eye 3
favorite 0
comment 0
We will consider the least-order torsional completion of gravity for a spacetime filled with fermionic Dirac matter fields, and we study the effects of the background-induced non-linear potentials for the matter field themselves in view of their effects for both standard models of physics: from the one of cosmology to that of particles, we will discuss the mechanisms of generation of the cosmological constant and particle masses as well as the phenomenology of leptonic weak-like forces and...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1401.7069
4
4.0
Jun 30, 2018
06/18
by
Daniele Pranzetti
texts
eye 4
favorite 0
comment 0
The Turaev-Viro state sum model provides a covariant spin foam quantization of three-dimensional Riemannian gravity with a positive cosmological constant {\Lambda}. We complete the program to canonically quantize the theory in the BF formulation using the formalism of Loop Quantum Gravity. In particular, we show first how quantum group structures arise from the requirement of the constraint algebra to be anomaly free. This allows us to generalize the construction of the physical scalar product,...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1402.2384
3
3.0
Jun 30, 2018
06/18
by
Leszek M. Sokołowski; Zdzisław A. Golda
texts
eye 3
favorite 0
comment 0
Several physical problems such as the `twin paradox' in curved spacetimes have purely geometrical nature and may be reduced to studying properties of bundles of timelike geodesics. The paper is a general introduction to systematic investigations of the geodesic structure of physically relevant spacetimes. The investigations are focussed on the search of locally and globally maximal timelike geodesics. The method of dealing with the local problem is in a sense algorithmic and is based on the...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1402.3976
3
3.0
Jun 30, 2018
06/18
by
Anuj Kumar Dubey; A K Sen
texts
eye 3
favorite 0
comment 0
Gravitational redshift is generally calculated without considering the rotation of a body. Neglecting the rotation, the geometry of space time can be described by using the spherically symmetric Schwarzschild geometry. Rotation has great effect on general relativity, which gives new challenges on gravitational redshift. When rotation is taken into consideration spherical symmetry is lost and off diagonal terms appear in the metric. The geometry of space time can be then described by using the...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1402.6491
3
3.0
Jun 30, 2018
06/18
by
S. H. Pereira; A. Pinho S. S.; J. M. Hoff da Silva
texts
eye 3
favorite 0
comment 0
Recent results on the dynamical stability of a system involving the interaction of the ELKO spinor field with standard matter in the universe have been reanalysed, and the conclusion is that such system does not exhibit isolated stable points that could alleviate the cosmic coincidence problem. When a constant parameter $\delta$ related to the potential of the ELKO field is introduced in the system however, stable fixed points are found for some specific types of interaction between the ELKO...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1402.6723
3
3.0
Jun 30, 2018
06/18
by
S. G. Rubin
texts
eye 3
favorite 0
comment 0
A dependence of low energy physics on initial conditions in the framework of multidimensional gravity is discussed. It is shown that the observable symmetries could be a result of specific topologies originated from space-time foam.
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1403.2062
4
4.0
Jun 30, 2018
06/18
by
S. Chattopadhyay; A. Ashurov; M. Khurshudyan; K. Myrzakulov; A. Pasqua; R. Myrzakulov
texts
eye 4
favorite 0
comment 0
In this paper, we study the main cosmological properties of the classical Friedmann equations in the case of homogeneous and isotropic Friedmann-Robertson-Walker Universe and we also generalized the expression of the Friedmann equation in the case of Loop Quantum Cosmology (LQC). Considering the $M_{35}$-model, we found the solutions of the equations considered for two particular cases, i.e. $Q=0$ (i.e., the de Sitter solution) and $Q>0$. Moreover, we considered and studied two exact...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1403.2815
4
4.0
Jun 30, 2018
06/18
by
Scott Robertson
texts
eye 4
favorite 0
comment 0
Analogue gravity experiments make feasible the realisation of black hole spacetimes in a laboratory setting and the observational verification of Hawking radiation. Since such analogue systems are typically dominated by dispersion, efficient techniques for calculating the predicted Hawking spectrum in the presence of strong dispersion are required. In the preceding paper, an integral method in Fourier space is proposed for stationary $1+1$-dimensional backgrounds which are asymptotically...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1403.7215
5
5.0
Jun 30, 2018
06/18
by
Carolina L. Benone; Ednilton S. de Oliveira; Sam R. Dolan; Luís C. B. Crispino
texts
eye 5
favorite 0
comment 0
We calculate the absorption cross section of a massive neutral scalar field impinging upon a Reissner-Nordstr\"om black hole. First, we derive key approximations in the high- and low-frequency regimes. Next, we develop a numerical method to compute the cross section at intermediate frequencies, and present a selection of results. Finally, we draw together our complementary approaches to give a quantitative full-spectrum description of absorption.
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1404.0687
3
3.0
Jun 30, 2018
06/18
by
M. Govender; S. Thirukkanesh
texts
eye 3
favorite 0
comment 0
In this paper we investigate the role of causal heat transport in a spatially homogeneous, locally-rotationally symmetric Bianchi type-V cosmological model. In particular, the causal temperature profile of the cosmological fluid is obtained within the framework of extended irreversible thermodynamics. We demonstrate that relaxational effects can alter the temperature profile when the cosmological fluid is out of hydrostatic equilibrium.
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1404.3092
6
6.0
Jun 30, 2018
06/18
by
Giovanni Acquaviva; Luca Bonetti; Luciano Vanzo; Sergio Zerbini
texts
eye 6
favorite 0
comment 0
The regularized vacuum fluctuation related to a conformally coupled massless scalar field defined on a space-time with dynamical horizon is computed with respect a radially moving observer in a generic flat Friedmann-Robertson-Walker space-time. Two simple measurement prescriptions are given in order to remove the ambiguity associated with the short distance singularity of the correlation function. In some cases, it turns out that one is dealing with a quantum thermometer, recovering a proposal...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1402.0718
3
3.0
Jun 30, 2018
06/18
by
Yasunori Fujii
texts
eye 3
favorite 0
comment 0
We discuss how we remove a huge discrepancy between the theory of a cosmological constant, due to the zero-point energies of matter fields, and the observation. The technique of dimensional regularization plays a decisive role. We eventually reach the desired behavior of the vacuum densities falling off like t^{-2}, allowing us to understand how an extremely small result comes about naturally. As a price, however, the zero-point energy vacuum fails to act as a true cosmological constant. Its...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1403.3749
8
8.0
Jun 30, 2018
06/18
by
Miguel Portilla
texts
eye 8
favorite 0
comment 0
Using an approximate solution to the $N$-body problem in general relativity, and the \emph{principle of local isotropy at any point}, we construct a cosmological model, with zero curvature, for a universe composed uniquely by collision-less gravitating point-particles. The result is not, as currently thought, a null pressure Friedman model, but one that reproduces quite well the dark phenomena. We assume that there exist three consecutive ages with this property, formed by free atoms, stars and...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1405.0399
5
5.0
Jun 30, 2018
06/18
by
Luke M. Butcher
texts
eye 5
favorite 0
comment 0
We calculate the Casimir energy-momentum tensor induced in a scalar field by a macroscopic ultrastatic spherically-symmetric long-throated traversable wormhole, and examine whether this exotic matter is sufficient to stabilise the wormhole itself. The Casimir energy-momentum tensor is obtained (within the $\mathbb{R}\times S_2$ throat) by a mode sum approach, using a sharp energy cut-off and the Abel-Plana formula; Lorentz invariance is then restored by use of a Pauli-Villars regulator. The...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1405.1283
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13
Jun 27, 2018
06/18
by
Lucas Gardai Collodel; Gilberto Medeiros Kremer
texts
eye 13
favorite 0
comment 0
An action of general form is proposed for a Universe containing matter, radiation and dark energy. The latter is interpreted as a tachyon field non-minimally coupled to the scalar curvature. The Palatini approach is used when varying the action so the connection is given by a more generic form. Both the self-interaction potential and the non-minimally coupling function are obtained by constraining the system to present invariability under global point transformation of the fields (Noether...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1505.00474
6
6.0
Jun 28, 2018
06/18
by
Abhay Ashtekar; Brajesh Gupt
texts
eye 6
favorite 0
comment 0
The effective description of loop quantum cosmology (LQC) has proved to be a convenient platform to study phenomenological implications of the quantum bounce that resolves the classical big-bang singularity. Originally, this description was derived using Gaussian quantum states with small dispersions. In this paper we present a generalization to incorporate states with large dispersions. Specifically, we derive the \emph{generalized} effective Friedmann and Raychaudhuri equations and propose a...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1509.08899
4
4.0
Jun 28, 2018
06/18
by
Antonio C. Gutiérrez-Piñeres; Abraão J. S. Capistrano
texts
eye 4
favorite 0
comment 0
A class of exact conformastatic solutions of the Einstein-Maxwell field equations is presented in which the gravitational and electromagnetic potentials are completely determined by a harmonic function only. The motion of test particles is investigated in the background of a space-time characterized by this class of solutions. We focus on the study of circular stable and unstable orbits obtained by taking account particular harmonic functions defining the gravitational potential. We show that...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1510.05400
4
4.0
Jun 28, 2018
06/18
by
Vassil K. Tinchev
texts
eye 4
favorite 0
comment 0
We explore the shadow of certain class generalized Kerr black holes, which are non vacuum solutions of the Einstein equations with exotic matter. The images depend on the angular momentum of the compact object, the characteristic parameter $l$ of the model, and the inclination angle of the observer. The results are compared with the case of the Kerr black hole and the Kerr naked singularity.
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1512.09164
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4.0
Jun 29, 2018
06/18
by
Michael J. Cole; Juan A. Valiente Kroon
texts
eye 4
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comment 0
We investigate the implications of the existence of Killing spinors in a spacetime. In particular, we show that in vacuum and electrovacuum a Killing spinor, along with some assumptions on the associated Killing vector in an asymptotic region, guarantees that the spacetime is locally isometric to the Kerr or Kerr-Newman solutions. We show that the characterisation of these spacetimes in terms of Killing spinors is an alternative expression of characterisation results of Mars (Kerr) and Wong...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1601.04666
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4.0
Jun 29, 2018
06/18
by
Giuseppe Alberti; Marco Merafina
texts
eye 4
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comment 0
The problem of the dynamical stability of anistropic systems is studied, by proposing a criterion in terms of the adiabatic local index $\gamma$. The result has general validity and can be applied to several physical situations. The stability can be achieved either for $\gamma \geq 4/3$ or $\gamma < 4/3$, according to the equation of state of the fluid considered. Configurations that can not exist in the isotropic regime can exist in the anisotropic one. Some applications of the criterion...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1601.06134
5
5.0
Jun 30, 2018
06/18
by
A. K. M. Masood-ul-Alam
texts
eye 5
favorite 0
comment 0
We show that non-degenerate multiple black hole solution of Einstein- Maxwell equations in an asymptotically flat axisymmetric spacetime cannot be in stationary equilibrium. This extends the uniqueness of Kerr-Newman solution first proved by Bunting and Mazur in a much wider desirable class. Spin-spin interaction cannot hold the black hole aparts even with electromagnetic forces.
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1407.5381
4
4.0
Jun 30, 2018
06/18
by
Benjamin Mesić; Ivica Smolić
texts
eye 4
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comment 0
It is known that the Jebsen-Birkhoff theorem is valid for vacuum solutions to Einstein's equation, as well as some of its generalizations. Using symmetry inheritance properties we investigate in detail the additional constraints that fields have to satisfy in order to allow the Jebsen-Birkhoff theorem in the non-vacuum cases of a wide class of gravitational field equations.
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1407.7246
