What is the relationship between degeneracy factor and photon polarization?

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Discussion Overview

The discussion centers around the relationship between the degeneracy factor and photon polarization, exploring the definitions and implications of these concepts in the context of quantum mechanics and electromagnetic theory. Participants are examining the nature of degeneracy factors, particularly for photons, and how these relate to the physical interpretation of polarization.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants inquire about the definition of the degeneracy factor and its specific value for photons, questioning its physical interpretation.
  • One participant asserts that the degeneracy factor of a photon is 2 due to its two possible polarizations, paralleling the degeneracy factor of electrons.
  • Another participant suggests that the degeneracy factor represents the number of states with the same energy level, likening it to "degrees of freedom" at that energy.
  • A participant expresses confusion regarding the relationship between photon polarization and the concept of modes in electromagnetic waves, asking if photons exist at the nodes of these waves.
  • There is a clarification that modes do not refer to nodes, and a suggestion to look up "normal mode" for further understanding.

Areas of Agreement / Disagreement

Participants generally agree that the degeneracy factor for photons is 2, but there is ongoing uncertainty and debate regarding the deeper meaning and implications of this factor, as well as the relationship between modes and polarization.

Contextual Notes

Some participants express difficulty in understanding the technical terminology and concepts, indicating potential gaps in foundational knowledge that may affect the discussion.

Who May Find This Useful

This discussion may be useful for individuals interested in quantum mechanics, particularly those exploring the concepts of degeneracy, photon behavior, and electromagnetic theory.

ajayguhan
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What is degeneracy factor?
What is the degeneracy factor of photon?
What is the difference between degeneracy factor and polarization of light?
 
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The linkypu have given has some article on the topic, "direct experimental characterization of the bose Einstein distribution of spatial fluctuations of spontaneous of spontaneous parametric downconersion"

I couldn't even understand the topic title!
 
Last edited:
Forget about that paper. The degeneracy factor of a photon is 2 because it may have two polarizations. The degeneracy factor of an electron is also 2 (spin up and spin down).
 
I can get that degeneracy factor of photon is 2
But what is this degeneracy factor? What is intuition behind it? Does it have physical interpretation?
 
Degeneracy factor is the number of states with the same energy level; think "degrees of freedom" with the same energy.
 
If so then how the degeneracy factor of photon is two?
I Know that light is an electromagnetic wave so there are two fields(electric and magnetic) oscillations perpendicular to each other.
 
Left handed or right handed polarization - the two spin states. They have the same energy for the same frequency.

Photons are the quantized modes of the Em field.
 
I know that modes are the number of nodes in standing waves.
But what you mean by photos are quantized modes of electromagnetic waves.
Does the photon lies in the nodes of electromagnetic waves?
 
  • #10
Modes are not nodes; look up modes of a drum head.
Modes correspond to the eigenvectors.
 
  • #11
What is modes?
 
  • #12
Lookup "normal mode" on Wikipedia.
 

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