Grants

Quantum effects in gravitational fields and their cosmological applications
Start:11.12.2015
End:10.12.2017
Ministry of Education and Science of RA, State Committee of Science Contracts (thematic) funding competition in 2015, a field, Physics and Astronomy

Short description

Vacuum expectation values (VEVs) of the current density, field squared and of the energy-momentum tensor will be investigated for charged scalar and fermionic fields in background of AdS spacetime with an arbitrary number of toroidally compactified spatial dimensions in the presence of branes. Applications will be given to Randall-Sundrume-type braneworld models. The radion stabilization and the generation of cosmological magnetic fields on the visible brane will be discussed. Combined quantum vacuum effects of the background curvature and topology will be investigated for the electromagnetic field in de Sitter space-time. The non-trivial topology is generated by the presence of a cosmic string. Two-point functions, the VEVs for the squared electric and magnetic fields and for the energy-momentum tensor will be evaluated in an arbitrary number of spatial dimensions. Applications will be given to inflationary models of the early Universe. The influence of the cosmic string will be discussed on the magnetic field seeds generated from inflation. The cosmological dynamics and dark energy models will be investigated in scalar-tensor theories with general kinetic and potential functions in the Lagrangian density for a scalar field and within the framework of f(R) -gravity.


Project Manager
Aram A. Saharian (Saharyan), Doctor of Science of Physics and Mathematics 

Staff members

Edward V. Chubaryan, Doctor of Science of Physics and Mathematics,
Roland M. Avagyan, Doctor of Science of Physics and Mathematics,
Gohar H. Harutyunyan, Doctor of Science of Physics and Mathematics,
Nvard A. Saharyan, Master student

Tel.: (+374 10) 474012
E-mail: saharian@ysu.am
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