Fig. 1: Modalities in ghost imaging.
From: How a thirty-year-old quantum tale of two photons became ghost imaging
Ghost imaging has evolved from early experiments with non-degenerate wavelengths to breakthroughs with hard x-rays, ultrafast reconstruction of temporal structures, and high-resolution imaging of entire biological specimens. Advances in miniaturised metasurfaces have further expanded its capabilities, while emerging techniques like entanglement-swapped GI open new possibilities, including the teleportation of images.
