Experimental physics study demonstrates three-photon superbunching using classical pseudothermal light in a linear system, suggesting pathways to enhanced ghost imaging visibility.
Three-photon superbunching is experimentally observed with the recently proposed superbunching pseudothermal light. To the best of our knowledge, it is the first time that three-photon superbunching is observed with classical light in a linear optical system. From the quantum optics point of view, three-photon superbunching is interpreted as the result of constructive-destructive three-photon interference. The key to observe three-photon superbunching with superbunching pseudothermal light is that all the different ways to trigger a three-photon coincidence count are in principle indistinguishable, which is experimentally guaranteed by putting a pinhole before each rotating ground glass to ensure that all the passed photons are within the same coherence area. The observed three-photon superbunching is helpful to increase the visibility of ghost imaging and understand the physics of third-order interference of light.
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Zhou et al. (2018) studied this question.
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