This is one of those still unspecified theories that seek to comprehend the general relativity of quantum mechanics. I'm not in this area, so I do not have expertise. But I know that many people who read about it know well the string theory and its competition, Loop Quantum Gravity.
In this video, Fermilab's Don Lincoln is trying to explain the LQG crowds.
Keep in mind that this idea is not yet supported in experimental support. The gamma ray bursts surveillance that he has already emphasized here on the back of the back.
Without experimental verification, both string theory and LQG continue to have their reliable issues as science.