Gertsenshtein-Zel$'$dovich effect explains the origin of Fast Radio
  Bursts
  We present a novel model that explains the origin of Fast Radio Bursts (FRBs)
-- short ($<1~\rm{s}$), bright ($0.1 - 1000~\rm{Jy}$) bursts of GHz frequency
radio waves. The model has three ingredients -- compact object, progenitor with
effective magnetic field strength around $10^{10}~{\rm Gauss}$, and GHz
frequency gravitational waves (GWs). The energy conversion from GWs to
electromagnetic waves occurs when GWs pass through the magnetosphere of such
compact objects due to the Gertsenshtein-Zel'dovich effect. This conversion
produces bursts of electromagnetic waves in the GHz range, leading to FRBs. Our
model has three key features: (i) can generate peak-flux up to $1000~{\rm Jy}$,
(ii) can naturally explain the pulse-width and (iii) predict FRB's random and
repeating nature with a wide flux range. We thus conclude that the millisecond
pulsars could be the progenitor of FRBs. Further, our model offers a novel
perspective on the indirection detection of GWs at high-frequency beyond
detection capabilities. Thus, transient events like FRBs are a rich source for
the current era of multi-messenger astronomy.
