Does photon spin imply its polarization

In summary, the photon has spin 1 and its magnetic number, represented by m in | \ell m \rangle, correlates with its polarization. Specifically, m=+1 and m=-1 correspond to circularly polarized light, while m=0 is forbidden due to the photon's masslessness. Superpositions can describe light of any fixed polarization.
  • #1
a2009
25
0
Hi all,

I know that the photon has spin 1. Does its magnetic number, the m in [tex] | \ell m \rangle [/tex] imply its polarization? For instance if m=1, does that mean it has circular polarization?

Personally I see no connection between the two.

Thanks for any help.
 
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  • #2
a2009 said:
I know that the photon has spin 1. Does its magnetic number, the m in [tex] | \ell m \rangle [/tex] imply its polarization? For instance if m=1, does that mean it has circular polarization?
The two helicity states m=+1 and m=-1 correspond to left and right circularly polarized light.
Superpositions describe light of arbitrary but fixed polarization.

The state m=0 is forbidden since the photon is massless.
 

Related to Does photon spin imply its polarization

1. What is photon spin?

Photon spin refers to the intrinsic angular momentum of a photon. It is a fundamental property of photons that cannot be explained by classical mechanics.

2. How is photon spin related to polarization?

Photon spin does not necessarily imply polarization. However, the polarization of a photon can be determined by its spin. This is because the direction of photon spin is always perpendicular to the direction of its propagation, which can be used to determine the polarization.

3. Can photons with different spins have the same polarization?

Yes, photons with different spins can have the same polarization. The polarization of a photon is determined by the direction of its electric field, not its spin. Therefore, photons with different spins can have the same electric field direction and thus the same polarization.

4. Is photon spin the same as angular momentum?

Yes, photon spin is a type of angular momentum. However, it is a unique form of angular momentum that is specific to photons and is not related to the physical rotation of an object.

5. How is photon spin measured?

Photon spin can be measured using various techniques, such as the Stern-Gerlach experiment or the Compton scattering experiment. These experiments involve interacting photons with other particles and measuring the resulting changes in their behavior, which can reveal information about their spin.

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