Johannes Skaar
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Related Articles from SNS
Cutting a photon in two creates an infinite swarm of particles
June 2, 2026 report Cutting a photon in two creates an infinite swarm of particles Sam Jarman Author Gaby Clark Scientific Editor Robert Egan Associate Editor By definition, elementary particles can't be broken into smaller pieces. But in a new theoretical study published in Physical Review Letters, Johannes Skaar and colleagues have revealed what would happen if you tried anyway for a single photon. The answer is deeply strange: attempting to cut a photon in two wouldn't produce two smaller...
Photons behave very strangely if you try to cut them
In Greek mythology, cutting one head off the Hydra of Lerna simply resulted in two more heads growing to replace it – and it turns out it’s even worse for photons. If you try to cut a piece off a particle of light, the result is infinitely many more of them being created. Some particles are elementary, which means that they cannot be broken into smaller pieces.