Results 11 to 20 of about 1,731,356 (293)

Exact inflationary solutions [PDF]

International Journal of Modern Physics D, 1998
We present a new class of exact inflationary solutions for the evolution of a universe with spatial curvature, filled with a perfect fluid, a scalar field with potential $V_{\pm}(\phi)=\lambda(\phi^2\pm\delta^2)^2$ and a cosmological constant $\Lambda ...
A., Angelantonj C., Copeland E. J., GABRIELLA PICCINELLI, Linde A. D., Lucchin F., MERCED MONTESINOS-VELÁSQUEZ, Mielke E. W., Olive K. A., Schunck F. E., TONATIUH MATOS, Turner M.   +11 more
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Exact solutions and their interpretation [PDF]

, 2002
This is the account of the workshop Exact solutions and their interpretation at the 16-th International Conference on General Relativity and Gravitation held in Durban, July 15-21, 2001.
Bicak, Jiri
core   +2 more sources

Exact anyon black hole solutions

European Physical Journal C: Particles and Fields, 2018
We present the exact anyon solutions and study their energy conditions. It is shown that the exact anyon VdW solutions with $$b>0$$ b>0 are physically un-acceptable.
Wei Xu
doaj   +1 more source

Quasi-Hyperbolically Symmetric γ-Metric

Entropy, 2023
We carry out a systematic study on the motion of test particles in the region inner to the naked singularity of a quasi-hyperbolically symmetric γ-metric. The geodesic equations are written and analyzed in detail. The obtained results are contrasted with
Luis Herrera, Alicia Di Prisco, Justo Ospino, Jaume Carot   +3 more
doaj   +1 more source

Exact solutions of closed string theory [PDF]

, 1995
We review explicitly known exact $D=4$ solutions with Minkowski signature in closed bosonic string theory. Classical string solutions with space-time interpretation are represented by conformal sigma models.
A A Tseytlin, Bardakci K, Bars I, Bars I, Behrndt K, Brinkmann H W, Callan C, Callan C, De Alwis S, de Boer J, de Vega H, de Vega H, Duff M, Duff M J, Duval C, Ferrara S, Figueroa-O'Farrill J M, Forgács P, Forgács P, Fradkin E S, Fradkin E S, Friedan D, Friedan D, Galtsov D, Gauntlett J, Gibbons G W, Gürses M, Halpern M B, Halpern M B, Horowitz G, Horowitz G, Horowitz G, Horowitz G T, Howe P, Israel W, Johnson C, Kallosh R, Kehagias A, Khuri R, Kiritsis E, Kiritsis E, Kiritsis E, Kounnas C, Kounnas C, Lovelace C, Mohammedi N, Morozov A Yu, Mukhi S, Nesterenko V V, Park J, Penrose R, Peterman A, Peterman A, Polyakov A, Polyakov A M, Russo J G, Russo J G, Russo J G, Sfetsos K, Sfetsos K, Townsend P K, Tseytlin A A, Tseytlin A A, Witten E, Yoneya T, Zamolodchikov A B   +65 more
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Anisotropic Stars: Exact Solutions [PDF]

General Relativity and Gravitation, 2002
We study the effects of anisotropic pressure on the properties of spherically symmetric, gravitationally bound objects. We consider the full general relativistic treatment of this problem and obtain exact solutions for various form of equations of state connecting the radial and tangential pressures.
Dev, Krsna, Gleiser, Marcelo
openaire   +3 more sources

Some exact Bradlow vortex solutions

Journal of High Energy Physics, 2017
We consider the Bradlow equation for vortices which was recently found by Manton and find a two-parameter class of analytic solutions in closed form on nontrivial geometries with non-constant curvature.
Sven Bjarke Gudnason, Muneto Nitta
doaj   +1 more source

Spherically Symmetric C³ Matching in General Relativity

Universe, 2023
We study the problem of matching interior and exterior solutions to Einstein’s equations along a particular hypersurface. We present the main aspects of the C3 matching approach that involve third-order derivatives of the corresponding metric tensors in ...
Hernando Quevedo
doaj   +1 more source

Approach to first-order exact solutions of the Ablowitz-Ladik equation [PDF]

, 2011
We derive exact solutions of the Ablowitz-Ladik (A-L) equation using a special ansatz that linearly relates the real and imaginary parts of the complex function.
Akhmediev, Nail, Ankiewicz, Adrian, Lederer, Falk   +2 more
core   +1 more source

Anisotropic chiral cosmology: Exact solutions [PDF]

International Journal of Modern Physics D, 2021
In this work, we investigate the anisotropic Bianchi type I cosmological model in the chiral set-up in a twofold manner. Firstly, we consider a quintessence plus a [Formula: see text]-essence-like model, where two scalar fields but only one potential term is considered.
Díaz-Barrón, Luis Rey, Espinoza-García, Abraham, Pérez-Payán, S., Socorro, J.   +3 more
openaire   +3 more sources