  It is well-known that gravitational waves can induce electromagnetic
perturbations in magnetised plasmas, with production occurring via the direct
coupling of gravitational waves to the background magnetic field: this is the
so-called Gertsenshtein effect. In this short work, we consider the direct
gravitational perturbations of charge carriers via their minimal coupling to
gravity in a collisionless plasma. We find that for isotropic plasmas, no
secondary plasma perturbations are generated. However, when an anisotropy is
introduced in the form of a background plasma current, we find that
gravitational waves can induce a secondary current. For a constant DC
background current, the secondary current inherits the AC frequency of the
gravitational waves. It will certainly be interesting to investigate this
effect in astrophysical plasmas in future work as well as its wider
phenomenological consequences.
