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Hamiltonian Dynamics of Cosmological Quintessence Models
Rossen I. Ivanov, Emil M. Prodanov
The time-evolution dynamics of two nonlinear cosmological real gas models has been reexamined in detail with methods from the theory of Hamiltonian dynamical systems. These example…
Equation of State for a van der Waals Universe during Reissner-Nordstrom Expansion
Emil M. Prodanov, Rossen I. Ivanov, V. G. Gueorguiev
In a previous work [E.M. Prodanov, R.I. Ivanov, and V.G. Gueorguiev, Reissner-Nordstrom Expansion, Astroparticle Physics 27 (150-154) 2007], we proposed a classical model for the e…
Reissner-Nordstrom Expansion
Emil M. Prodanov, Rossen I. Ivanov, V. G. Gueorguiev
We propose a classical mechanism for the cosmic expansion during the radiation-dominated era. This mechanism assumes that the Universe is a two-component gas. The first component i…
Haunted Kaluza Universe with Four-dimensional Lorentzian Flat, Kerr, and Taub-NUT Slices
Rossen I. Ivanov, Emil M. Prodanov
The duality between the original Kaluza's theory and Klein's subsequent modification is duality between slicing and threading decomposition of the five-dimensional spacetime. The f…
Riemann Tensor of the Ambient Universe, the Dilaton and the Newton's Constant
Rossen I. Ivanov, Emil M. Prodanov
We investigate a four-dimensional world, embedded into a five-dimensional spacetime, and find the five-dimensional Riemann tensor via generalisation of the Gauss (--Codacci) equati…