Talk detail

Participant	Obukhov, Yuri
Institution	Nuclear Safety Institute, Russian Academy of Sciences - B. Tulskaya 52 - Moscow - Moscow - Russia

Session	AT5	Accepted		Order	Time
Talk	Oral abstract	Title	Premetric approach in gravity and electrodynamics
Coauthors
Abstract	We will discuss the basics of the premetric approach, including the essential details of the formalism and some of its beautiful consequences. We demonstrate how the classical electrodynamics can be developed without a metric in a quite straightforward way: Maxwell's equations, together with the general response law for material media, admit a consistent premetric formulation. Furthermore, we show that in relativistic theories of gravity, the premetric program leads to a better understanding of the interdependence between topological, affine, and metric concepts, that is, between those concepts related to the surgery of a manifold, to parallel transfer, and to spatio-temporal distances, respectively.
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Session	PT3	Accepted		Order	Time
Talk	Oral abstract	Title	Quantum and classical dynamics of spin in gravitational and electromagnetic fields
Coauthors
Abstract	Understanding the dynamics of fermion particles with dipole moments (electrons, protons, neutrons, neutrinos) in arbitrary gravitational and electromagnetic fields is important for various astrophysical and experimental problems. We report the results of a comprehensive study of the classical and quantum dynamics of spin 1/2 Dirac fermion particles with dipole moments under the simultaneous action of arbitrary external fields. The gauge-theoretic framework of the general-relativistically covariant Dirac theory allows to describe in a consistent way the minimal and nonminimal couplings of fermions to external fields of different physical nature. In this approach, the spacetime can have either the Riemannian or the post-Riemannian geometry, and the analysis of the spin dynamics is of interest for tests of gravity theories. We derive the quantum and quasiclassical equations of motion of spin and demonstrate a complete consistency of the quantum and classical spin dynamics. As applications, we discuss the spin-gravitational phenomena in precision experiments, in particular, effects of terrestrial gravity and rotation in the high-energy physics are evaluated, the bounds on the new physical coupling parameters in post-Riemannian gravity models are obtained, and magnetic resonance setup is used to find manifestations of the gravitational wave on spin.
Pdf file