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- Can two photons combine to give a local field with spin 2
Can two photons combine to give a local field with spin 2
What about up conversion? (Opposite of down conversion). Admittedly I don’t know much about that other than the name.dextercioby said:No. They cannot. There is no direct photon-photon interaction, nor a photon-photon bound state (similar to a hydrogen atom, for example).