5 papers
Covariant field with unique mass and spin 3/2
Ion I. Cotaescu
We present the explicit theory of eight-dimen\-sional massive covariant fields with single spin transforming according to the representation $(\frac{3}{2},0)\oplus(0,…
New charged dynamical particles in spatially flat FLRW space-times
Ion I. Cotaescu
New time-dependent metric tensors with spherical symmetry satisfying the Einstein-Maxwell equations in space-times with FLRW asymptotic behaviour are derived here for the first tim…
Masses dynamics during black hole evaporation in spatially flat FLRW universes
Ion I. Cotaescu, Ion Cotaescu
The new dynamical solutions of Einstein's equations with perfect fluid in space-times with FLRW asymptotic behaviour, derived recently \cite{Cot,Cot1,Cot2}, may describe evaporatin…
Operators of Dirac's theory with mass and axial chemical potential
Ion I. Cotaescu
The Dirac equation with mass and axial chemical potential is solved analytically obtaining the mode spinors and corresponding projection operators giving the spectral representatio…
Operators of quantum theory of Dirac's free field
Ion I. Cotaescu
The Pryce (e) spin and position operators of the quantum theory of Dirac's free field were re-defined and studied recently with the help of a new spin symmetry and suitable spectra…