Browsing Physics / Fizik by Subject "Vacuum energy"
Now showing items 16 of 6

Affine inflation
(American Physical Society, 201706)Affine gravity, a gravity theory based on affine connection with no notion of metric, supports scalar field dynamics only if scalar fields have nonvanishing potential. The nonvanishing vacuum energy ensures that the ... 
Cosmological consequences of a variable cosmological constant model
(World Scientific Publishing, 201706)We derive a model of dark energy which evolves with time via the scale factor. The equationofstate is studied as a function of a parameter α introduced in this model as = (1  2α)/(1 + 2α). In addition to the recent ... 
Eddington's gravity in immersed spacetime
(IOP Publishing, 20150319)We formulate Eddington's affine gravity in a spacetime that is immersed in a larger eightdimensional space endowed with a hypercomplex structure. The dynamical equation of the first immersed Riccitype tensor leads to ... 
Separate EinsteinEddington spaces and the cosmological constant
(Wiley, 20160501)Based on Eddington affine variational principle on a locally product manifold, we derive the separate Einstein space described by its Ricci tensor. The derived field equations split into two field equations of motion that ... 
Vacuum energy as the origin of the gravitational constant
(Springer, 200911)We develop a geometrodynamical approach to the cosmological constant problem (CCP) by invoking a geometry induced by the energymomentum tensor of vacuum, matter and radiation. The construction, which utilizes the dual ... 
A way to get rid of cosmological constant and zeropoint energy problems of quantum fields through metric reversal symmetry
(IOP Publishing, 200806)In this paper, a framework is introduced to remove the huge discrepancy between the empirical value of the cosmological constant and the contribution to the cosmological constant predicted from the vacuum energy of quantum ...