Recent content by JWillis

I think the above issues about virtual particles have been discussed here on Physics Forums on a number of occasions. My main question was, is this type of perturbative expansion still required in Loop Quantum Gravity - I think A. Neumaier had already indicated indicated that virtual particles...

My apologies to A. Neumaier - I think my choice of wording was poor, but I now have some serious confusion. From the first Insights articles, I was talking about the phrasing: "They cannot be said to exist in space and time, have no position, no meaningful probabilities to be created or...

Hi all, Following up on another post - for a layman, can someone describe the status of virtual particles in Loop Quantum Gravity models? Since LQG avoid UV divergences, and has a different structure from field-based theories, are virtual particles still talked about? (in the context of closed...

Interesting thread! This may be too far off topic - but I've read that Loop Quantum Gravity doesn't require renormalization (basically the fundamental length/time limits mean that the associated integrals don't diverge), that is, avoids all UV divergence issues. In this case, do you end up...