Speaker
Stefan Gmuca
(Institute of Physics, Slovak Academy of Sciences)
Description
The exchange part of energy density of the linear Dirac-Hartree-Fock (DHF) model in dense matter is evaluated in a parameter-free closed form and expressed as density functional. After the rearranging terms the relativistic mean-field approach with density-dependent couplings may be recovered with density dependence coming from the Fock interaction. The formalism developed, is then extended to the nonlinear DHF approximation with field self-couplings allowed. The nonlinear self-interactions result in essential density dependence of effective couplings that is decoupled from the Fock one. Finally, the model is applied to investigate the properties of dense stellar matter.
Author
Stefan Gmuca
(Institute of Physics, Slovak Academy of Sciences)
Co-author
Kristian Petrik
(Institute of Physics, Slovak Academy of Sciences)
