## Search

Now showing items 1-10 of 12

#### Eddington's gravity in immersed spacetime

(IOP Publishing, 2015-03-19)

We formulate Eddington's affine gravity in a spacetime that is immersed in a larger eight-dimensional space endowed with a hypercomplex structure. The dynamical equation of the first immersed Ricci-type tensor leads to ...

#### It is sufficient to set the cosmological constant to zero or to a small number at an initial time

(TÜBİTAK, 2016)

I point out a simple but usually overlooked fact about the cosmological constant problem: to solve the cosmological constant problem it is sufficient to find a symmetry or mechanism that sets the cosmological constant to ...

#### Stress-energy connection and cosmological constant problem

(Elsevier, 2011-07)

We study gravitational properties of vacuum energy by erecting a geometry on the stress-energy tensor of vacuum, matter and radiation. Postulating that the gravitational effects of matter and radiation can be formulated ...

#### A symmetry for vanishing cosmological constant in an extra-dimensional toy model

(Elsevier, 2005-08)

We introduce a symmetry principle that forbids a bulk cosmological constant in six and ten dimensions. Then the symmetry is extended in six dimensions so that it insures absence of 4-dimensional cosmological constant induced ...

#### A symmetry for vanishing cosmological constant: Another realization

(Elsevier, 2006-08)

A more conventional realization of a symmetry which had been proposed towards the solution of cosmological constant problem is considered. In this study the multiplication of the coordinates by the imaginary number i in ...

#### Single scale factor for the universe from the creation of radiation and matter till the present

(Springer, 2014-09-23)

A scheme for incorporating the creation of radiation
and matter into the cosmological evolution is introduced
so that it becomes possible to merge the times before and after
the creation of radiation and matter in a ...

#### Stress-energy connection: Degravitating the vacuum energy

(World Scientific Publishing, 2013)

This talk summarizes recent studies on the gravitational properties of vacuum energy in a non-Riemannian geometry formed by the stress-energy tensor of vacuum, matter and radiation. Postulating that the gravitational effects ...

#### Separate Einstein-Eddington spaces and the cosmological constant

(Wiley, 2016-05-01)

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 ...

#### Towards the solution of cosmological constant and zero point energy problems through metric reversal symmetry

(IOP Publishing, 2009)

In this talk I review my studies on metric reversal symmetry and their further implications. The talk is mainly concentrated on the relevance of the metric reversal symmetry to the solutions of the cosmological constant ...

#### Vacuum energy as the origin of the gravitational constant

(Springer, 2009-11)

We develop a geometro-dynamical approach to the cosmological constant problem (CCP) by invoking a geometry induced by the energy-momentum tensor of vacuum, matter and radiation. The construction, which utilizes the dual ...