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19922026
Showing 2003 · gr-qcShow all

5 papers · 2 filters

gr-qc2003★ 8 cited

On the Quasi-Isotropic Inflationary Solution

Giovanni Paolo Imponente, Giovanni Montani

In this paper we find a solution for a quasi-isotropic inflationary Universe which allows to introduce in the problem a certain degree of inhomogeneity. We consider a model which g…

gr-qc2003★ 19 cited

Radon transform of Wheeler-De Witt equation and tomography of quantum states of the universe

V. I. Manko, G. Marmo, C. Stornaiolo

The notion of standard positive probability distribution function (tomogram) which describes the quantum state of universe alternatively to wave function or to density matrix is in…

gr-qc2003★ 20 cited

Spacetime Noncommutativity and Antisymmetric Tensor Dynamics in the Early Universe

Elisabetta Di Grezia, Giampiero Esposito, Agostino Funel +2

This paper investigates the possible cosmological implications of the presence of an antisymmetric tensor field related to a lack of commutatitivity of spacetime coordinates at the…

gr-qc2003★ 152 cited

Time Delay in Black Hole Gravitational Lensing as a Distance Estimator

V. Bozza, L. Mancini

We calculate the time delay between different relativistic images formed by black hole gravitational lensing in the strong field limit. For spherically symmetric black holes, it tu…

gr-qc2003★ 11 cited

Newtonian limit of String-Dilaton Gravity

Salvatore Capozziello, Gaetano Lambiase

We study the weak-field limit of string-dilaton gravity and derive corrections to the Newtonian potential which strength directly depends on the self interaction potential and the…