Problem with quantum entanglement of photons

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Discussion Overview

The discussion revolves around the quantum entanglement of photons, specifically addressing the role of electric and magnetic components in the polarization of light. Participants explore the implications of these components in understanding entanglement phenomena, including the polarization paradox and the completeness of existing explanations.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions the omission of the magnetic component in discussions of photon polarization and entanglement, suggesting it may be crucial for understanding the polarization paradox.
  • Another participant notes that in quantum field theory, the electric-magnetic field is just one of many bases for describing quantum states, implying that the choice of basis is subjective and does not necessitate the inclusion of both components.
  • A later reply proposes that the electric and magnetic components could form a basis for a vector at 45°, potentially explaining phenomena related to polarization without invoking hidden variables.
  • One participant speculates that the magnetic component might influence the results observed in polarization experiments, suggesting that anomalies could arise from focusing solely on the electric component.

Areas of Agreement / Disagreement

Participants express differing views on the necessity of including the magnetic component in discussions of photon entanglement and polarization. The discussion remains unresolved, with multiple competing perspectives on the role of electric and magnetic components.

Contextual Notes

Participants acknowledge limitations in existing explanations, particularly regarding the choice of basis in quantum field theory and the implications of focusing on only the electric component in polarization discussions.

Jim_G
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I'm trying to follow the logic to the quantum theory of the entanglement of light. I'd like to ask a question about one of several problems I'm having with the entanglement.

If:
Photons (Light) have orthogonal electric and magnetic waves.

And:
In discussions of polarization of light for the entanglement of photons I find no reference to the magnetic waves, even in discussions of "hidden variables".

Also, the "polarization paradox" discussions seem to ignore the magnetic wave component.

(By polarization paradox I mean a 45° polarizer between an H and V polarizer will restore light)

It seems the magnetic component can predict the electric component, and vice versa.
Likewise, the polarization paradox experiments seems to show there is information at 45° (between the orthogonal magnetic and electric waves).

Then:
Either I missed something, or the magnetic component needs to be accounted for in the polarization of photons.

Thanks in advance for setting me straight on this particular entanglement issue.
 
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In quantum field theory of light, the electric-magnetic field corresponds to only one of many possible bases in which quantum states can be expanded. Another useful basis is the number-of-photons basis. So entanglement can be described in any of these bases, but when you use one basis you don't need to use the other one. It's a matter of personal choice. I hope it answers your question.
 
Thank you for your reply Demystifier, you have addressed my larger, unstated questions which do include photon detection as well (from your example; the number-of-photon basis).

Please allow me to rephrase my smaller question:

The explanations for photon entanglement that I have read appear to have chosen the electric-magnetic basis in order to use polarization data as evidence for photon entanglement.

The explanations (I've seen) seem incomplete, since only the electric component of the basis is discussed during the generation photon polarization data.

In terms of bases in general, it seems the electric and magnetic waves could form a basis for a vector, say at 45°, which may explain:

1) the polarization paradox experiments

or

2) the apparent mystery expressed at how polarization information in the photon appears to be lost and then restored again during other experiments.

... without the need for a hidden variable.

At any rate, to me the entanglement polarization data seems suspect when there appears to be no accounting for the magnetic component of the selected electric - magnetic basis.

Question rephrased:

When the electric - magnetic basis is used to explain quantum entanglement of photons from polarization data, why does the magnetic part seem to be ignored?

Thanks again to all in advance for helping me with this question.
 
Maybe I have an answer to my own question.

If:
as per the above, when an electric - magnetic wave reacts with a molecule in a polarizing structure, any "charge" of the molecule appears in relative motion to the magnetic component of the incident light / photon. This would result in a force along the plane of the electric component.

Then:
For ordinary discussions of polarization, it may be sufficient to consider only the electric plane / component of the electric - magnetic wave.

Conclusion:
Possibly some anomalies found with light / photon polarizing data measured in the electric component plane, are a result of the magnetic component of the incident light / photon.

I'll go with this for now and see where it ends up.
 

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