A gravitational field is observed as both a particle and a wave. The bubble/film collapse at a double slit or concentric slit configuration generates bursts of particles/droplets. The droplets beyond the "invisible" slits can be regarded as dark matter, having the same fluid/gravitational properties of the original particle/wave.
Bubble: inflated disk (static monopole) > collapsing field/waves > energetic expanding particles
Image of particles projected onto a truncated cone.
Image of particles projected onto a cone.
Danilo Zia et al, Interferometric imaging of amplitude and phase of spatial biphoton states, Nature Photonics (2023). DOI: 10.1038/s41566-023-01272-3