an·ti-bunch·ing | \ ¦an-ˌtī-¦bən-chiŋ 
, ¦an-tē- \
, ¦an-tē- \Definition of anti-bunching
physics
: the nonuniform distribution of elementary particles (such as photons or fermions) in a beam
Researchers term this unusual pattern of photon emission anti-bunching, which means there is a significant time delay between successive photons when they are emitted … — United Press International, 13 Apr. 2001 What would happen if the bosons were replaced by fermionic particles such as electrons? Fermions cannot occupy the same energy state, and “antibunching”—an anticorrelation between the particle intensities measured at two detectors—would be expected in equivalent experiments.— Markus Büttiker, Science, 9 Apr. 1999 — compare bunching
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The first known use of anti-bunching was in 1974
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