### Conveners

#### [VC-T] Varying constants – theory

- Mikhail Kozlov (Petersburg Nuclear Physics Institute)

#### [VC-T] Varying constants – theory

- Mikhail Kozlov (Petersburg Nuclear Physics Institute)

Astronomical observations provide constraints on the time variation of the fundamental constants, the proton to electron mass ratio and the fine structure constant. These constants are dependent on particular combinations of the Quantum Chromodynamic Scale, the Higgs Vacuum Expectation Value and the Yukawa Couplings. The coefficients of these particle physics parameters are model dependent...

Diatomic molecules are very promising probes for variation of fundamental constants (VFC), as their spectra can be very sensitive to both α and μ, making it possible to look for change in both constants in a single experiment [1].

Nearly degenerate levels with different sensitivity to VFC may provide huge enhancements of the relative variation, since δω/ω tends to infinity when the distance...

We formulate the basic framework of thermodynamical entropic force cosmology which allows variation of the gravitational constant G and the speed of light c. Some cosmological solutions are given and tested against combined observational data (supernovae, BAO, and CMB). We observationally test that the fit of the data is allowed for the speed of light c growing and the gravitational constant G...

Using the method of regularization of singularities due to varying constants, I will first discuss some proposals to construct the cyclic models of the universe which can be connected by standard and non-standard singularities. Then, on the footing of thermodynamics and the 2nd law I will discuss the cyclic multiverse models having different values of the fundamental constants which can...

In the talk I will focus on quantum cosmology minisuperspace models based on the Wheeler–DeWitt equation which apart from standard matter and 3-geometry configuration degrees of freedom allow those related to the variability of physical constants – varying speed of light (VSL) c and varying gravitational constant G. The probability of tunneling of the universe “from nothing” to the Friedmann...