Physicists discover that gravity can create light

Amazing stuff! It was published in the Physics of the Dark Universe of all journals! Science can be fun! 😊

If confirmed, this may be consequential! Caveat: I did not read the entire paper.

"... More details will be given in a follow-up paper. ..." And it is a sequel! Stay tuned!

The paper also contains curiosities like:

"... In passing, we shall mention that for a travelling gravitational wave in vacuum, the parametric resonance does not occur, even if the scalar field is massless. This is because the lightcones of the gravitational wave and the scalar field overlap with each other. Sitting on the wavefront of the scalar wave, one does not “feel” the oscillation induced by the gravitational wave. ..."

From the abstract (this abstract appears weird as it does not seem to really relate to the title of the paper):

"We study the parametric resonance excitation of the electromagnetic field by a gravitational wave. We show that there is narrow band resonance. For an electromagnetic field in the vacuum the resonance occurs only in the second band, and its strength is thus suppressed by two powers of amplitude of the gravitational wave. On the other hand, in the case of an electromagnetic field in a medium with the speed of light smaller than 1 (in natural units), there is a band of Fourier modes which undergo resonance in the first band."

Physicists discover that gravity can create light (secondary source)

Physicists Discover that Gravity Can Create Light (primary source) Researchers have discovered that in the exotic conditions of the early universe, waves of gravity may have shaken space-time so hard that they spontaneously created radiation.

Graviton to photon conversion via parametric resonance (open access)