48 citations · 243 across the 15 of their papers we have counts for
15 papers
Revisiting the Schrödinger-Dirac equation
Nicolas Fleury, Fayçal Hammad, Parvaneh Sadeghi
In flat spacetime, the Dirac equation is the "square root" of the Klein-Gordon equation in the sense that by applying the square of the Dirac operator to the Dirac spinor, one reco…
Fresh look at the effects of gravitational tidal forces on a freely-falling quantum particle
F. Hammad, P. Sadeghi, N. Fleury +1
We take a closer and new look at the effects of tidal forces on the free fall of a quantum particle inside a spherically symmetric gravitational field. We derive the corresponding…
What can we learn from the conformal noninvariance of the Klein-Gordon equation?
F. Hammad, P. Sadeghi, N. Fleury +1
It is well known that the Klein-Gordon equation in curved spacetime is conformally noninvariant, both with and without a mass term. We show that such a noninvariance provides nontr…
Noether charge and black hole entropy in teleparallel gravity
F. Hammad, D. Dijamco, A. Torres-Rivas +1
The Noether charge associated to diffeomorphism invariance in teleparallel gravity is derived. It is shown that the latter yields the ADM mass of an asymptotically flat spacetime.…
Landau levels in a gravitational field: The Levi-Civita and Kerr spacetimes case
Fayçal Hammad, Alexandre Landry
We have recently found that the gravitational field of a static spherical mass removes the Landau degeneracy of the energy levels of a particle moving around the mass inside a magn…
Landau levels in a gravitational field: The Schwarzschild spacetime case
Alexandre Landry, Fayçal Hammad
We investigate the gravitational effect on Landau levels. We show that the familiar infinite Landau degeneracy of the energy levels of a quantum particle moving inside a uniform an…