We review many quantum aspects of torsion theory and discuss the possibility of the space–
time torsion to exist and to be detected. The paper starts, in Section 2, with a pedagogical …

The theoretical grounds of the modern relativistic methods for quantum chemical calculation
of spin–spin coupling constants in nuclear magnetic resonance spectra are considered …

Einstein proposed his theory of special relativity in 1905. For a long time it was believed that
this theory has no significant impact on chemistry. This view changed in the 1970s when it …

Exact decoupling of positive-and negative-energy states in relativistic quantum chemistry is
discussed in the framework of unitary transformation techniques. The obscure situation that …

The gravitational effects in the relativistic quantum mechanics are investigated. The exact
Foldy-Wouthuysen transformation is constructed for the Dirac particle coupled to the static …

A general method of the Foldy-Wouthyusen (FW) transformation for relativistic particles of
arbitrary spin in strong external fields has been developed. The use of the found …

A method of Foldy-Wouthuysen transformation for relativistic spin-1/2 particles in external
fields is proposed. It permits determination of the Hamilton operator in the Foldy …

In this paper, by using the canonical Foldy–Wouthuysen transformation for relativistic spin-
1/2 particles, we investigate the non-relativistic limit and determine the basic properties of …

Classical spin is described in terms of velocities and acceleration so that knowledge of
advanced mathematics is not required. Written in the three-dimensional notation of vector …

The block diagonalization of the Hamiltonian is not sufficient for the transformation to the
Foldy–Wouthuysen (FW) representation. The conditions enabling the transition from the …