V. N. Ponomarev

Problems of classical and quantum-gravitational collapse X. Creation of massless scalar particles by the torsion field

The effect of the creation of massless scalar particles by a cosmological torsion field is considered. It is shown that the particles produced make an initially isotropic universe anisotropic.

A new variant of nonlinear electrodynamics. I

Equations are derived for a nonlinear electromagnetic field, the nonlinearity of which is produced by spin-spin coupling induced by curvature of space-time. The electrostatic solution of these equations in Minkowski space is studied.

Problems of classical and quantum-gravitational collapse: IV. Quantum cosmology and scalar field

Various aspects of the statics and dynamics of spherical gravitational distributions of an ideal fluid with distributed sources of zero-mass and massive vector fields are investigated. Both unrestricted configurations and isolated configurations with the appropriate matching to the external geometry are considered.

Classical and quantum gravitational collapse I. General-relativistic dynamics of an ideal liquid

This article is the first of a series of studies devoted to several problems of quantum and classical cosmology as well as to the gravitational collapse of inhomogeneous configurations. In this article we consider the structure of the theory of gravitational collapse and we construct the Hamiltonian of an ideal liquid with an arbitrary equation of state.

Problems of classical and quantum-gravitational collapse V. (Quantum cosmology. scalar field. continuation)

The study of the system of homogeneous gravitational and scalar fields is continued in the framework o f the formalism of canonical quantization. Solution of de Witts equation by perturbation theory leads to the prediction of production of scalar matter by a nonstationary quantized gravitational field.

Classical and quantum gravitational collapse

The quantization of a homogeneous isotropic closed Friedmann model filled with an ideal fluid is discussed within the framework of a geometrodynamical approach.

Problems of classical and quantum gravitational collapse: VII. General relativistic Lagrangian dynamics of charged media

The general relativistic motion and equilibrium of charged media is treated on the basis of equations derived by varying a Lagrangian that explicitly contains a term with the interaction of a perfect fluid with the corresponding field.

Problems of classical and quantum gravitational collapse. II (general relativistic hamiltonian dynamics of a perfect fluid)

The Dirac scheme of the canonical formalism is formulated for the description of an interacting system consisting of matter and the gravitational field; this scheme is applied to a spherical distribution of a perfect fluid in the case of a maximally hard equation of state; an exact special solution of the corresponding canonical equations is obtained; the ADM method is used to construct the true Hamiltonian of the system consisting of a perfect fluid and the gravitational field; ways to quantize the model are considered.