Can two photons combine to give a local field with spin 2?

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Two photons cannot combine to create a local field with spin 2 due to the absence of direct photon-photon interactions or photon-photon bound states, akin to the structure of a hydrogen atom. The discussion confirms that such interactions do not occur, reinforcing the fundamental principles of quantum field theory. The concept of up conversion was mentioned but not elaborated upon, indicating a need for further exploration of this topic.

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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
 
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No. They cannot. There is no direct photon-photon interaction, nor a photon-photon bound state (similar to a hydrogen atom, for example).
 
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Thank you very much dextercioby for attend me. Best regards.
 
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).
What about up conversion? (Opposite of down conversion). Admittedly I don’t know much about that other than the name.
 

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