Fig. 10
From: Divergent features of collective gravitational quantum excitations

(a) The probability current density of plasmon excitation as a function of quasiparticle energy and distance. (b) The probability current density of GQ excitation as a function of quasiparticle energy and distance. (c) The Hubble’s constant of plasmon excitation as a function of quasiparticle energy. (d) The Hubble’s constant of GQ excitation is a function of quasiparticle energy.