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What happens when you try to chop a photon in half?

A mirror that moves mid-photon could release a shower of new photons.

What happens when you try to chop a photon in half?

TL;DR

  • Photons are typically indivisible particles of light, but they also lack a specific location, existing as extended objects.
  • An experiment is proposed where a mirror is removed while a photon is reflecting, potentially dividing the photon.
  • This division is a nonlinear process that requires specific conditions, such as a changing medium or high-intensity light.
  • Removing the mirror mid-reflection creates sharp transitions in the electromagnetic field, requiring a broader frequency spectrum than the original photon possessed.
  • The photon is hypothesized to enter a superposition state of both reflected and transmitted light, and the division could generate multiple new photons, leading to a rainbow effect.
  • Performing this experiment requires specialized equipment, including single-photon sources and materials that can switch reflectivity extremely rapidly, like semiconductors activated by ultrafast lasers.
  • Evidence for similar phenomena exists in the shortening of ultrashort pulses, where reflected pulses gain more frequencies, implying new photon generation.