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B Gravity waves And entanglement quesro

  1. Mar 12, 2016 #1
    So this is gonna sound ridiculous, but I want to push my curiosity to the limit.

    Gravitational waves propogate at the speed of light, like most things in the universe.

    My first question is : is this propogation slowed down by anything? The Higgs field perhaps?

    2nd question ; I assume that gravity waves act like other waves, and that they are susseptible to interference, and perhaps other quantum mechanical effects. Does this mean that excitations in a gravity field (graviton a) be entangled with another excitation in the field?

    P.S. Sorry about spelling/grammar errors. I'm on a phone.
  2. jcsd
  3. Mar 12, 2016 #2


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    The propagation of gravity waves is likely slowed down by mass carrying objects in the same way that light waves are slowed down by charge carrying objects. The gravitational energy causes the masses to oscillate, which in turn, produce minute secondary gravity waves at a time delay. This, with the main gravity wave, gives the effect of a decrease in speed in matter. In that sense, you could imagine a planet or a gas giant acting like a lens for gravity waves, but the index of refraction would be so close to that of a vacuum, there would be likely no observable effect. Plus, it might be that absorption would dominate over refraction, in which case the planet would be like an absorbing medium.

    If real gravitons exist, then it is certainly possible for them to be entangled. If the two gravitons can interact, even indirectly, than that interaction could create entanglement. Also, if there were a kind of event that produces pairs of gravitons, those gravitons are likely entangled due to energy and momentum conservation.
  4. Mar 12, 2016 #3


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    We do not have a proper quantum theory of gravity so far, but there is no indication that the Higgs field would give gravitons a mass.
    The coupling is way too weak for such an experiment, but theoretically with much stronger gravity, it would be possible.
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