Classical and quantum polarization

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Discussion Overview

The discussion revolves around the transition from classical 4-vector polarization to the two-component quantum polarization, specifically in the context of photons. Participants seek to clarify the relationship between these concepts and the implications for understanding polarization in quantum mechanics.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • Mark inquires about the process of deriving the two-component quantum polarization of a photon from a classical 4-vector polarization.
  • Another participant suggests that Mark's question lacks clarity and detail, indicating uncertainty about the specific aspects of polarization he is interested in.
  • Mark confirms his interest in how the two-component polarization, which represents a quantum bit, is obtained from the classical 4-component vector.
  • A later reply notes that a classical electromagnetic wave also has only two independent possible polarizations, but reiterates the need for more background information to provide a satisfactory answer.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the clarity of the initial question, and multiple viewpoints regarding the necessary details and context remain unresolved.

Contextual Notes

There is a lack of specific background information in the initial question, which may affect the ability to provide a comprehensive response. The discussion also highlights the dependence on definitions of polarization in both classical and quantum contexts.

mtak0114
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Hi
I would like to know how you get from the classical 4-vector polarization
to the two component quantum polarization?

thank you

Mark
 
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mtak0114 said:
Hi
I would like to know how you get from the classical 4-vector polarization
to the two component quantum polarization?

You might want to rephrase your question to include more detail,
since it's not very clear what you're really asking. I'm guessing
you're interested in something about the 2-component polarization
of photons and maybe neutrinos, but... hmm... I'm not sure from your
question.
 
yes I am interested in how one gets a 2-component polarization of a photon (which represents a quantum bit) from a 4-component classical polarization vector.

thanks
 
mtak0114 said:
yes I am interested in how one gets a 2-component polarization of a photon (which represents a quantum bit) from a 4-component classical polarization vector.

A classical EM wave also has only two independent possible polarizations.

(I.e., you're still not giving enough background/detail in your question to enable
a satisfactory answer.)
 

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