Constructing and solving cosmologies of early universes with dark energy and dark matter
Seminars
The Bogoliubov Laboratory of Theoretical Physics
Joint Laboratory Seminar
Date and Time: Thursday, 1 November 2018, at 3:00 PM
Venue: Blokhintsev Hall (4th floor), Bogoliubov Laboratory of Theoretical Physics
Seminar topic: “Constructing and solving cosmologies of early universes with dark energy and dark matter”
Speaker: Filippov A. T.
Abstract:
This talk is the progress report of the project initiated in 2008. A unified model of dark matter and dark energy is based on the minimal affine extension of general relativity. It predicts a new massive vector particle vecton interacting only with gravity. The vecton dynamics is defined by a geometrically motivated nonlinear kinetic energy term related to one proposed by Eddington and Einstein. At small vecton kinetic energy (cold vecton dark matter) it is roughly the sum of the standard vector meson Lagrangian and the cosmological constant term. The final aim of the project is to approximately solve this model in the low-energy inflationary regime and in the high-energy regime (transition to big bang).
The fore-ground to this work lies in the new approach to scalaron dynamics that allows to exactly solve the standard scalaron cosmologies in inflationary regime. It is important that this regime emerges from non-flat, anisotropic initial state and that our approach is applicable to intrinsically anisotropic vecton cosmologies. Our mathematical formalism is extremely simple and gives new criteria for inflationary and other regimes. In addition, we can completely solve the inverse problem – to find potentials providing early cosmologies with pre-assume properties, which are defined by two characteristic functions. In the inflationary domain the both functions must be small, which means that the potential is approximately constant, ≈v0. This prediction of our approach is consistent with present observational data. Moreover, it looks possible to approximately relate to the observed Hubble parameter. It follows that the whole theory depends only on one unknown constant – the mass of the vecton.