The Relativistic Electrodynamics Least Action Principles Revisited: New Charged Point Particle and Hadronic String Models Analysis

The classical relativistic least action principle is revisited from the vacuum field theory approach. New physically motivated versions of relativistic Lorentz type forces are derived, a new relativistic hadronic string model is proposed and analyzed in detail.Comment: n/

Conformal and Affine Hamiltonian Dynamics of General Relativity

The Hamiltonian approach to the General Relativity is formulated as a joint nonlinear realization of conformal and affine symmetries by means of the Dirac scalar dilaton and the Maurer-Cartan forms. The dominance of the Casimir vacuum energy of physical fields provides a good description of the type Ia supernova luminosity distance--redshift relation. Introducing the uncertainty principle at the Planck's epoch within our model, we obtain the hierarchy of the Universe energy scales, which is supported by the observational data. We found that the invariance of the Maurer-Cartan forms with respect to the general coordinate transformation yields a single-component strong gravitational waves. The Hamiltonian dynamics of the model describes the effect of an intensive vacuum creation of gravitons and the minimal coupling scalar (Higgs) bosons in the Early Universe.Comment: 37 pages, version submitted to Gen. Rel. Gra

Low-Temperature Anomaly in Ionic Conductivity of Scandia-Stabilized Zirconia

In the 625-740 К temperature range on ceramic composition for 89 mol.% ZrO2 + 10 mol. % Sc2O3 + 1 mol. % CeO2 the jump in ionic conductivity was experimentally detected by a factor of ten with temperature increase. Disconnectedness of indicated anomaly with polymorphic transformation was established by method of X-ray spectral analysis. Discovered effect has the orientation character due to the synchronous ordering of grains for Т ≥ 500 К.</jats:p

Electro-Optical Modulation in Planar Aligned Ferroelectric Liquid Crystals with Subwavelength Helix Pitch

We study experimentally electro-optical modulation in a planar aligned deformed-helix ferroelectric liquid crystal (DHFLC) with subwavelength helix pitch that is less than 100 nm, while thickness of the liquid crystal layer is around 50 μm. The electrically tunable phase shift of light from 0 to 2p and the ellipticity of the transmitted light were measured at the electro-optical response frequency of more than 1 kHz as functions of time and voltage applied across the cell. It is shown experimentally that under the conditions indicated above, the modulation of the ellipticity attenuates with decreasing wavelength of the incident light. It has been shown theoretically that even the maximum modulation of the ellipticity observed in experiments does not have a significant effect on the formation of light fields with nonzero angular momentum. Therefore, the planar aligned DHFLC cells with a thick liquid crystal layer can be used in those areas of optics where the pure phase modulation of light is required at frequency of more than 1 kHz. © Pozhidaev E. P., Barbashov V. A., Kesaev V. V., Pogonin V. I., Samagin S. A., Kotova S. P., Torgova S. I., Chigrinov V. G., 2017