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

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Discussion Overview

The discussion centers on whether two photons can combine to create a local field with spin 2, exploring the nature of photon interactions and potential bound states.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants assert that two photons cannot combine to form a local field with spin 2 due to the absence of direct photon-photon interactions and the lack of a photon-photon bound state.
  • Another participant introduces the concept of up conversion, questioning its relevance to the discussion but admits limited knowledge about the topic.

Areas of Agreement / Disagreement

Participants generally agree that two photons cannot combine in the manner proposed, but the introduction of up conversion indicates that multiple views or uncertainties may exist regarding related processes.

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TL;DR
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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