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10 papers · 1 filter
Stability of equilibria for the free rigid body
Petre Birtea, Ioan Casu, Tudor S. Ratiu +1
The stability for all generic equilibria of the Lie-Poisson dynamics of the rigid body dynamics is completely determined. It is shown that for the generalized ri…
On the universality of the Carter and McLenaghan formula
Ion I Cotaescu
It is shown that the formula of the isometry generators of the spinor representation given by Carter and McLenaghan is universal in the sense that this holds for any representation…
The quantum theory of the free Maxwell field on the de Sitter expanding universe
Ion I. Cotaescu, Cosmin Crucean
The theory of the free Maxwell field in two moving frames on the de Sitter spacetime is investigated pointing out that the conserved momentum and energy operators do not commute to…
Variation of mass in primordial nucleosynthesis as a test of Induced Matter Brane Gravity
S. Jalalzadeh, A. M. Yazdani
The variation of mass in induced matter theory using Ceroch-Stewart-Walter perturbations of submanifolds [1] is redefined. It is shown that the deviation of primordial Helium produ…
Coulomb scattering for scalar field in Scr\" odinger picture
Crucean Cosmin, Racoceanu Radu, Pop Adrian
The scattering of a charged scalar field on Coulomb potential on de Sitter space-time is studied using the solution of the free Klein-Gordon equation. We find that the scattering a…
Amplitude of Coulomb scattering for charged scalar field in de Sitter spacetime
Crucean Cosmin
The scattering of a charged scalar field on Coulomb potential is studied using solutions of the Klein-Gordon equation which have a definite momentum. One obtains that in contrast w…