# On time variations of gravitational and Yang-Mills constants in a cosmological model of superstring origin

@article{Ivashchuk2014OnTV, title={On time variations of gravitational and Yang-Mills constants in a cosmological model of superstring origin}, author={Vladimir D. Ivashchuk and Vitaly N. Melnikov}, journal={Gravitation and Cosmology}, year={2014}, volume={20}, pages={26-29} }

In the framework of 10-dimensional Friedmann-Calabi-Yau cosmology of superstring origin, we show that the time variation of either Newton’s gravitational constant or Yang-Mills one is unavoidable in the present epoch.

## 11 Citations

### Variations in the Gravitational Constant in General Theories of Gravitation

- Physics, Geology
- 2015

A class of multidimensional theories is identified in which the spatial and temporal variations in the gravitational constant and the fine structure constant have a common origin and are of the same…

### On exponential solutions in the Einstein–Gauss–Bonnet cosmology, stability and variation of G

- Physics, Mathematics
- 2016

A D-dimensional gravitational model with Gauss–Bonnet and cosmological terms is considered. When an ansatz with a diagonal cosmological metric is adopted, we find new examples of solutions for Λ Λ ≠…

### On stable exponential solutions in Einstein–Gauss–Bonnet cosmology with zero variation of G

- Physics, Mathematics
- 2016

A D-dimensional gravitational model with a Gauss–Bonnet term and the cosmological constant Λ is considered. Assuming diagonal cosmological metrics, we find, for certain Λ > 0, new examples of…

### On exponential cosmological type solutions in the model with Gauss–Bonnet term and variation of gravitational constant

- Physics, Mathematics
- 2015

A $$D$$D-dimensional gravitational model with Gauss–Bonnet term is considered. When an ansatz with diagonal cosmological type metrics is adopted, we find solutions with an exponential dependence of…

### On stability of exponential cosmological solutions with non-static volume factor in the Einstein–Gauss–Bonnet model

- Mathematics
- 2016

A $$(n+1)$$(n+1)-dimensional gravitational model with Gauss–Bonnet term and a cosmological constant term is considered. When ansatz with diagonal cosmological metrics is adopted, the solutions with…

### Exact exponential cosmological solutions with two factor spaces of dimension m in EGB model with a Λ-term

- MathematicsInternational Journal of Geometric Methods in Modern Physics
- 2019

A [Formula: see text]-dimensional Einstein–Gauss–Bonnet (EGB) model with the cosmological term [Formula: see text] is considered. We find a class of solutions with exponential time dependence of two…

### Kinematic and statistical inconsistencies of Hořava–Lifshitz cosmology

- PhysicsPhysics of the Dark Universe
- 2019

### Stable exponential cosmological solutions with zero variation of G in the Einstein–Gauss–Bonnet model with a $$\Lambda $$Λ-term

- Physics, Mathematics
- 2017

A D-dimensional gravitational model with a Gauss–Bonnet term and the cosmological term $$\Lambda $$Λ is considered. By assuming diagonal cosmological metrics, we find, for a certain fine-tuned…

### Stable exponential cosmological solutions with 3- and l-dimensional factor spaces in the Einstein–Gauss–Bonnet model with a $$\Lambda $$Λ-term

- Mathematics, Physics
- 2017

A D-dimensional gravitational model with a Gauss–Bonnet term and the cosmological term $$\Lambda $$Λ is studied. We assume the metrics to be diagonal cosmological ones. For certain fine-tuned…

### Stable exponential cosmological solutions with zero variation of G and three different Hubble-like parameters in the Einstein–Gauss–Bonnet model with a $$\Lambda $$Λ-term

- Physics, Mathematics
- 2017

We consider a D-dimensional gravitational model with a Gauss–Bonnet term and the cosmological term $$\Lambda $$Λ. We restrict the metrics to diagonal cosmological ones and find for certain $$\Lambda…

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