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Composite S-brane solutions in multidimensional gravity with scalar fields and fields of forms related to Toda-like systems are presented. These solutions are defined on a product manifold R_{*} x M_1 x ... x M_n, where R_{*} is a time…

High Energy Physics - Theory · Physics 2009-11-07 V. D. Ivashchuk

Multidimensional gravitational model on the manifold $M = M_0 \times \prod_{i=1}^{n} M_i$, where $M_i$ are Einstein spaces ($i \geq 1$), is considered. The action contains $m = 2^n -1$ dilatonic scalar fields $\phi^I$ and $m$…

High Energy Physics - Theory · Physics 2014-11-18 V. D. Ivashchuk , V. N. Melnikov

Gravity coupled to an arbitrary number of antisymmetric tensors and scalar fields in arbitrary space-time dimensions is studied in a context of general, static, spherically symmetric solutions with many orthogonally intersecting branes.…

High Energy Physics - Theory · Physics 2009-11-10 Marcin P. Flak , Krzysztof A. Meissner

Multidimensional model describing the "cosmological" and/or spherically symmetric configuration with n+1 Einstein spaces in the theory with several scalar fields and forms is considered. When electro-magnetic composite p-brane ansatz is…

General Relativity and Quantum Cosmology · Physics 2007-05-23 V. D. Ivashchuk , V. N. Melnikov

Multidimensional cosmological model describing the evolution of n+1 Einstein spaces in the theory with several scalar fields and forms is considered. When a (electro-magnetic composite) p-brane Ansatz is adopted the field equations are…

High Energy Physics - Theory · Physics 2009-10-30 V. D. Ivashchuk , V. N. Melnikov

The block-orthogonal generalization of the Majumdar-Papapetrou type solutions for the sigma-model studied earlier are obtained and corresponding solutions with p-branes are considered. The existence of solutions and the number of…

High Energy Physics - Theory · Physics 2009-10-31 V. D. Ivashchuk , V. N. Melnikov

A multidimensional gravitational model containing several dilatonic scalar fields and antisymmetric forms is considered. The manifold is chosen in the form M = M_0 x M_1 x ... x M_n, where M_i are Einstein spaces (i > 0). The block-diagonal…

High Energy Physics - Theory · Physics 2009-10-30 V. D. Ivashchuk , V. N. Melnikov

We consider a gravitational model on a manifold M = M_0 x M_1 x...x M_n with oriented connected Einstein internal spaces M_1,...,M_n. The matter part of the action contains several scalar fields and antisymmetric forms. With Ricci-flat…

General Relativity and Quantum Cosmology · Physics 2008-02-03 V. D. Ivashchuk , V. N. Melnikov , M. Rainer

This topical review deals with a multidimensional gravitational model containing dilatonic scalar fields and antisymmetric forms. The manifold is chosen in the form M = M_0 x M_1 x ...x M_n, where M_i are Einstein spaces (i >0). The…

High Energy Physics - Theory · Physics 2010-04-06 V. D. Ivashchuk , V. N. Melnikov

Black hole generalized p-brane solutions for a wide class of intersection rules are obtained. The solutions are defined on a manifold that contains a product of n - 1 Ricci-flat internal spaces. They are defined up to a set of functions H_s…

Mathematical Physics · Physics 2014-11-18 V. D. Ivashchuk , V. N. Melnikov

The low energy effective actions which arise from string theory or M-theory are considered in the cosmological context, where the graviton, dilaton and antisymmetric tensor field strengths depend only on time. We show that previous results…

High Energy Physics - Theory · Physics 2009-10-07 H. Lu , J. Maharana , S. Mukherji , C. N. Pope

Partially supersymmetric intersecting (non-marginal) composite M-brane solutions defined on the product of Ricci-flat manifolds M_0 x M_1 x ... x M_n in D= 11 supergravity are considered and formulae for fractional numbers of unbroken…

High Energy Physics - Theory · Physics 2015-01-23 V. D. Ivashchuk

A classical model of gravity theory with several dilatonic scalar fields and differential forms admitting an interpretation in terms of intersecting p-branes is studied in (pseudo)-Riemannian space-time $M =R_+\times S^{d_0}\times R_t\times…

General Relativity and Quantum Cosmology · Physics 2007-05-23 S. Cotsakis , V. R. Gavrilov , V. N. Melnikov

A family of spherically symmetric solutions in the model with m-component anisotropic fluid is considered. The metric of the solution depends on parameters q_s, s = 1,...,m, relating radial pressures and the densities and contains (n -1)m…

General Relativity and Quantum Cosmology · Physics 2008-12-18 H. Dehnen , V. D. Ivashchuk

A new parameterisation of the solutions of Toda field theory is introduced. In this parameterisation, the solutions of the field equations are real, well-defined functions on space-time, which is taken to be two-dimensional Minkowski space…

High Energy Physics - Theory · Physics 2010-04-06 G. Papadopoulos , B. Spence

The bosonic content of string theory in curved background of multidimensional structure with p-branes has a systematic geometrical description as an effective sigma-model of gravity in lower dimension (say 3+1) with additional interacting…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Martin Rainer

Black hole generalized p-brane solutions for a wide class of intersection rules are obtained. The solutions are defined on a manifold that contains a product of n - 1 Ricci-flat ``internal'' spaces. They are defined up to a set of functions…

High Energy Physics - Theory · Physics 2007-05-23 V. D. Ivashchuk , V. N. Melnikov

We consider a D-dimensional cosmological model describing an evolution of Ricci-flat factor spaces, M_1,...M_n (n > 2), in the presence of an m-component perfect fluid source (n > m > 1). We find characteristic vectors, related to the…

General Relativity and Quantum Cosmology · Physics 2015-06-25 U. Kasper , V. R. Gavrilov , V. N. Melnikov , M. Rainer

A multidimensional field model describing the behaviour of (at most) one Einstein space of non-zero curvature and n Ricci-flat internal spaces is considered. The action contains several dilatonic scalar fields and antisymmetric forms. The…

General Relativity and Quantum Cosmology · Physics 2007-05-23 K. A. Bronnikov , M. A. Grebeniuk , V. D. Ivashchuk , V. N. Melnikov

A new class of integrable two-dimensional dilaton gravity theories, in which scalar matter fields satisfy the Toda equations, is proposed. The simplest case of the Toda system is considered in some detail, and on this example we outline how…

High Energy Physics - Theory · Physics 2008-03-31 A. T. Filippov
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