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Stern-Gerlach experiment with Gravitons

  1. Dec 28, 2011 #1
    It has long been predicted that gravitons will be spin 2. If that is true, then if we have a sufficient magnetic field, what is to stop us from recreating the Stern-Gerlach experiment and using a magnetic field to diffract them?

    Now, we have made very strong magnetic fields and to my knowledge, diffracting gravitons have never been detected.

    The only reason I can think of, is that the gravitons are virtual, but that should not mean the magnetic field does not effect them, right?
  2. jcsd
  3. Dec 29, 2011 #2


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    The B-field does not couple to the spin but to the magnetic moment μ which is proportional to the spin S

    μ = g q/2m S

    where the dimensionless quantity g is called the g-factor.

    For a elementary, massless, uncharged particle it is natural to assume g=0 (there may be quantum effects changing this relation).

    Before asking this question regarding gravitons one should try to answer this question for photons.
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